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2639 vulnerabilities found for junos by juniper
FKIE_CVE-2026-21918
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:41
Severity ?
Summary
A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of packets is encountered a double free happens. This causes flowd to crash and the respective FPC to restart.
This issue affects Junos OS on SRX and MX Series:
* all versions before 22.4R3-S7,
* 23.2 versions before 23.2R2-S3,
* 23.4 versions before 23.4R2-S4,
* 24.2 versions before 24.2R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106018 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106018 | Vendor Advisory |
Impacted products
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FKIE_CVE-2026-21920
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 18:51
Severity ?
Summary
An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX Series device configured for DNS processing, receives a specifically formatted DNS request flowd will crash and restart, which causes a service interruption until the process has recovered.
This issue affects Junos OS on SRX Series:
* 23.4 versions before 23.4R2-S5,
* 24.2 versions before 24.2R2-S1,
* 24.4 versions before 24.4R2.
This issue does not affect Junos OS versions before 23.4R1.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106020 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106020 | Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.4 | |
| juniper | junos | 24.4 | |
| juniper | junos | 24.4 | |
| juniper | junos | 24.4 | |
| juniper | srx1500 | - | |
| juniper | srx1600 | - | |
| juniper | srx2300 | - | |
| juniper | srx300 | - | |
| juniper | srx320 | - | |
| juniper | srx340 | - | |
| juniper | srx345 | - | |
| juniper | srx380 | - | |
| juniper | srx4100 | - | |
| juniper | srx4120 | - | |
| juniper | srx4200 | - | |
| juniper | srx4300 | - | |
| juniper | srx4600 | - | |
| juniper | srx4700 | - | |
| juniper | srx5400 | - | |
| juniper | srx5600 | - | |
| juniper | srx5800 | - |
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FKIE_CVE-2026-21921
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 18:52
Severity ?
Summary
A Use After Free vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker authenticated with low privileges to cause a Denial-of-Service (DoS).
When telemetry collectors are frequently subscribing and unsubscribing to sensors continuously over a long period of time, telemetry-capable processes like chassisd, rpd or mib2d will crash and restart, which - depending on the process - can cause a complete outage until the system has recovered.
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* 23.2 versions before 23.2R2-S5-EVO,
* 23.4 versions before 23.4R2-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106021 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106021 | Vendor Advisory |
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FKIE_CVE-2026-21913
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:40
Severity ?
Summary
An Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
On EX4000 models with 48 ports (EX4000-48T, EX4000-48P, EX4000-48MP) a high volume of traffic destined to the device will cause an FXPC crash and restart, which leads to a complete service outage until the device has automatically restarted.
The following reboot reason can be seen in the output of 'show chassis routing-engine' and as a log message:
reason=0x4000002 reason_string=0x4000002:watchdog + panic with core dump
This issue affects Junos OS on EX4000-48T, EX4000-48P and EX4000-48MP:
* 24.4 versions before 24.4R2,
* 25.2 versions before 25.2R1-S2, 25.2R2.
This issue does not affect versions before 24.4R1 as the first Junos OS version for the EX4000 models was 24.4R1.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106014 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106014 | Vendor Advisory |
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FKIE_CVE-2026-21917
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:41
Severity ?
Summary
An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart.
This issue affects Junos OS on SRX Series:
* 23.2 versions from 23.2R2-S2 before 23.2R2-S5,
* 23.4 versions from 23.4R2-S1 before 23.4R2-S5,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R1-S3, 24.4R2.
Earlier versions of Junos are also affected, but no fix is available.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA105996 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA105996 | Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.2 | |
| juniper | junos | 24.4 | |
| juniper | junos | 24.4 | |
| juniper | junos | 24.4 | |
| juniper | junos | 24.4 | |
| juniper | srx1500 | - | |
| juniper | srx1600 | - | |
| juniper | srx2300 | - | |
| juniper | srx300 | - | |
| juniper | srx320 | - | |
| juniper | srx340 | - | |
| juniper | srx345 | - | |
| juniper | srx380 | - | |
| juniper | srx4100 | - | |
| juniper | srx4120 | - | |
| juniper | srx4200 | - | |
| juniper | srx4300 | - | |
| juniper | srx4600 | - | |
| juniper | srx4700 | - | |
| juniper | srx5400 | - | |
| juniper | srx5600 | - | |
| juniper | srx5800 | - |
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"value": "An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nIf an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart.\nThis issue affects Junos OS on SRX Series:\n\n\n\n * 23.2 versions from 23.2R2-S2 before 23.2R2-S5,\u00a0\n * 23.4 versions from 23.4R2-S1 before 23.4R2-S5,\n * 24.2 versions before 24.2R2-S2,\n * 24.4 versions before 24.4R1-S3, 24.4R2.\n\n\nEarlier versions of Junos are also affected, but no fix is available."
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FKIE_CVE-2026-21914
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:41
Severity ?
Summary
An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (Dos).
If an SRX Series device receives a specifically malformed GPRS Tunnelling Protocol (GTP) Modify Bearer Request message, a lock is acquired and never released. This results in other threads not being able to acquire a lock themselves, causing a watchdog timeout leading to FPC crash and restart. This issue leads to a complete traffic outage until the device has automatically recovered.
This issue affects Junos OS on SRX Series:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S3,
* 24.4 versions before 24.4R2-S2,
* 25.2 versions before 25.2R1-S1, 25.2R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106015 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106015 | Vendor Advisory |
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FKIE_CVE-2026-21909
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:40
Severity ?
Summary
A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated attacker controlling an adjacent IS-IS neighbor to send a specific update packet causing a memory leak. Continued receipt and processing of these packets will exhaust all available memory, crashing rpd and creating a Denial of Service (DoS) condition.
Memory usage can be monitored through the use of the 'show task memory detail' command. For example:
user@junos> show task memory detail | match ted-infra
TED-INFRA-COOKIE 25 1072 28 1184 229
user@junos>
show task memory detail | match ted-infra
TED-INFRA-COOKIE 31 1360 34 1472 307
This issue affects:
Junos OS:
* from 23.2 before 23.2R2,
* from 23.4 before 23.4R1-S2, 23.4R2,
* from 24.1 before 24.1R2;
Junos OS Evolved:
* from 23.2 before 23.2R2-EVO,
* from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO,
* from 24.1 before 24.1R2-EVO.
This issue does not affect Junos OS versions before 23.2R1 or Junos OS Evolved versions before 23.2R1-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106008 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106008 | Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 24.1 | |
| juniper | junos | 24.1 | |
| juniper | junos_os_evolved | 23.2 | |
| juniper | junos_os_evolved | 23.2 | |
| juniper | junos_os_evolved | 23.2 | |
| juniper | junos_os_evolved | 23.2 | |
| juniper | junos_os_evolved | 23.4 | |
| juniper | junos_os_evolved | 23.4 | |
| juniper | junos_os_evolved | 23.4 | |
| juniper | junos_os_evolved | 23.4 | |
| juniper | junos_os_evolved | 24.1 | |
| juniper | junos_os_evolved | 24.1 |
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FKIE_CVE-2026-21908
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:40
Severity ?
Summary
A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service (DoS), or potentially execute arbitrary code within the context of the process running as root.
The issue is specific to the processing of a change in authorization (CoA) when a port bounce occurs. A pointer is freed but was then referenced later in the same code path. Successful exploitation is outside the attacker's direct control due to the specific timing of the two events required to execute the vulnerable code path.
This issue affects systems with 802.1X authentication port-based network access control (PNAC) enabled.
This issue affects:
Junos OS:
* from 23.2R2-S1 before 23.2R2-S5,
* from 23.4R2 before 23.4R2-S6,
* from 24.2 before 24.2R2-S3,
* from 24.4 before 24.4R2-S1,
* from 25.2 before 25.2R1-S2, 25.2R2;
Junos OS Evolved:
* from 23.2R2-S1 before 23.2R2-S5-EVO,
* from 23.4R2 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-S3-EVO,
* from 24.4 before 24.4R2-S1-EVO,
* from 25.2 before 25.2R1-S2-EVO, 25.2R2-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106007 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106007 | Vendor Advisory |
Impacted products
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"value": "A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of\u00a0Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service (DoS), or potentially execute arbitrary code within the context of the process running as root.\n\nThe issue is specific to the processing of a change in authorization (CoA) when a port bounce occurs. A pointer is freed but was then referenced later in the same code path. Successful exploitation is outside the attacker\u0027s direct control due to the specific timing of the two events required to execute the vulnerable code path.\n\nThis issue affects systems with 802.1X authentication port-based network access control (PNAC) enabled.\nThis issue affects:\n\nJunos OS:\u00a0\n\n\n\n * from 23.2R2-S1 before 23.2R2-S5,\u00a0\n * from 23.4R2 before 23.4R2-S6,\u00a0\n * from 24.2 before 24.2R2-S3,\u00a0\n * from 24.4 before 24.4R2-S1,\u00a0\n * from 25.2 before 25.2R1-S2, 25.2R2;\u00a0\n\n\n\n\nJunos OS Evolved:\u00a0\n\n\n\n * from 23.2R2-S1 before 23.2R2-S5-EVO,\u00a0\n * from 23.4R2 before 23.4R2-S6-EVO,\u00a0\n * from 24.2 before 24.2R2-S3-EVO,\u00a0\n * from 24.4 before 24.4R2-S1-EVO,\u00a0\n * from 25.2 before 25.2R1-S2-EVO, 25.2R2-EVO."
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FKIE_CVE-2026-21906
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:40
Severity ?
Summary
An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart.
When PowerMode IPsec (PMI) and GRE performance acceleration are enabled and the device receives a specific ICMP packet, a crash occurs in the SRX PFE, resulting in traffic loss. PMI is enabled by default, and GRE performance acceleration can be enabled by running the configuration command shown below. PMI is a mode of operation that provides IPsec performance improvements using Vector Packet Processing.
Note that PMI with GRE performance acceleration is only supported on specific SRX platforms.
This issue affects Junos OS on the SRX Series:
* all versions before 21.4R3-S12,
* from 22.4 before 22.4R3-S8,
* from 23.2 before 23.2R2-S5,
* from 23.4 before 23.4R2-S5,
* from 24.2 before 24.2R2-S3,
* from 24.4 before 24.4R2-S1,
* from 25.2 before 25.2R1-S1, 25.2R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106005 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106005 | Vendor Advisory | |
| sirt@juniper.net | https://www.juniper.net/documentation/us/en/software/junos/vpn-ipsec/topics/topic-map/security-powermode-ipsec-vpn.html | Technical Description |
Impacted products
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"descriptions": [
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"lang": "en",
"value": "An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart.\n\nWhen PowerMode IPsec (PMI) and GRE performance acceleration are enabled and the device receives a specific ICMP packet, a crash occurs in the SRX PFE, resulting in traffic loss. PMI is enabled by default, and GRE performance acceleration can be enabled by running the configuration command shown below.\u00a0PMI is a mode of operation that provides IPsec performance improvements using Vector Packet Processing.\n\nNote that PMI with GRE performance acceleration is only supported on specific SRX platforms.\nThis issue affects Junos OS on the SRX Series:\n\n\n\n * all versions before 21.4R3-S12,\u00a0\n * from 22.4 before 22.4R3-S8,\u00a0\n * from 23.2 before 23.2R2-S5,\u00a0\n * from 23.4 before 23.4R2-S5,\u00a0\n * from 24.2 before 24.2R2-S3,\u00a0\n * from 24.4 before 24.4R2-S1,\u00a0\n * from 25.2 before 25.2R1-S1, 25.2R2."
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],
"id": "CVE-2026-21906",
"lastModified": "2026-01-23T19:40:34.157",
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"attackVector": "NETWORK",
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"baseScore": 7.5,
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"published": "2026-01-15T21:16:06.177",
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"tags": [
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}
FKIE_CVE-2026-21905
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:40
Severity ?
Summary
A Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the SIP application layer gateway (ALG) of Juniper Networks Junos OS on SRX Series and MX Series with MX-SPC3 or MS-MPC allows an unauthenticated network-based attacker sending specific SIP messages over TCP to crash the flow management process, leading to a Denial of Service (DoS).
On SRX Series, and MX Series with MX-SPC3 or MS-MPC service cards, receipt of multiple SIP messages causes the SIP headers to be parsed incorrectly, eventually causing a continuous loop and leading to a watchdog timer expiration, crashing the flowd process on SRX Series and MX Series with MX-SPC3, or mspmand process on MX Series with MS-MPC.
This issue only occurs over TCP. SIP messages sent over UDP cannot trigger this issue.
This issue affects Junos OS on SRX Series and MX Series with MX-SPC3 and MS-MPC:
* all versions before 21.2R3-S10,
* from 21.4 before 21.4R3-S12,
* from 22.4 before 22.4R3-S8,
* from 23.2 before 23.2R2-S5,
* from 23.4 before 23.4R2-S6,
* from 24.2 before 24.2R2-S3,
* from 24.4 before 24.4R2-S1,
* from 25.2 before 25.2R1-S1, 25.2R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106004 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106004 | Vendor Advisory |
Impacted products
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FKIE_CVE-2026-21903
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:40
Severity ?
Summary
A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service (DoS).
Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting in an FPC crash and restart.
The issue was not seen when YANG packages for the specific sensors were installed.
This issue affects Junos OS:
* all versions before 22.4R3-S7,
* 23.2 version before 23.2R2-S4,
* 23.4 versions before 23.4R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA106022 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA106022 | Vendor Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| juniper | junos | * | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 22.4 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.2 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 | |
| juniper | junos | 23.4 |
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FKIE_CVE-2026-0203
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:39
Severity ?
Summary
An Improper Handling of Exceptional Conditions vulnerability in packet processing of Juniper Networks Junos OS allows an unauthenticated, network-adjacent attacker sending a specifically malformed ICMP packet to cause an FPC to crash and restart, resulting in a Denial of Service (DoS).
When an ICMP packet is received with a specifically malformed IP header value, the FPC receiving the packet crashes and restarts. Due to the specific type of malformed packet, adjacent upstream routers would not forward the packet, limiting the attack surface to adjacent networks.
This issue only affects ICMPv4. ICMPv6 is not vulnerable to this issue.
This issue affects Junos OS:
* all versions before 21.2R3-S9,
* from 21.4 before 21.4R3-S10,
* from 22.2 before 22.2R3-S7,
* from 22.3 before 22.3R3-S4,
* from 22.4 before 22.4R3-S5,
* from 23.2 before 23.2R2-S3,
* from 23.4 before 23.4R2-S3,
* from 24.2 before 24.2R1-S2, 24.2R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA104294 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/JSA104294 | Vendor Advisory |
Impacted products
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An Improper Handling of Exceptional Conditions vulnerability in packet processing of Juniper Networks Junos OS allows an unauthenticated, network-adjacent attacker sending a specifically malformed ICMP packet to cause an FPC to crash and restart, resulting in a Denial of Service (DoS).\n\n\n\nWhen an ICMP packet is received with a specifically malformed IP header value, the FPC receiving the packet crashes and restarts. Due to the specific type of malformed packet, adjacent upstream routers would not forward the packet, limiting the attack surface to adjacent networks.\n\nThis issue only affects ICMPv4. ICMPv6 is not vulnerable to this issue.\n\nThis issue affects Junos OS:\u00a0\n\n\n\n * all versions before 21.2R3-S9,\u00a0\n * from 21.4 before 21.4R3-S10,\u00a0\n * from 22.2 before 22.2R3-S7,\u00a0\n * from 22.3 before 22.3R3-S4,\u00a0\n * from 22.4 before 22.4R3-S5,\u00a0\n * from 23.2 before 23.2R2-S3,\u00a0\n * from 23.4 before 23.4R2-S3,\u00a0\n * from 24.2 before 24.2R1-S2, 24.2R2."
}
],
"id": "CVE-2026-0203",
"lastModified": "2026-01-23T19:39:55.133",
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"published": "2026-01-15T21:16:05.457",
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"tags": [
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"url": "https://kb.juniper.net/JSA104294"
},
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FKIE_CVE-2025-60007
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:39
Severity ?
Summary
A NULL Pointer Dereference vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS on MX, SRX and EX Series allows a local attacker with low privileges to cause a Denial-of-Service (DoS).
When a user executes the 'show chassis' command with specifically crafted options, chassisd will crash and restart. Due to this all components but the Routing Engine (RE) in the chassis are reinitialized, which leads to a complete service outage, which the system automatically recovers from.
This issue affects:
Junos OS on MX, SRX and EX Series:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R2.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA103173 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/ | Vendor Advisory |
Impacted products
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"value": "A NULL Pointer Dereference vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS on MX, SRX and EX Series allows a local attacker with low privileges to cause a Denial-of-Service (DoS).\n\n\nWhen a user executes the \u0027show chassis\u0027 command with specifically crafted options, chassisd will crash and restart. Due to this all components but the Routing Engine (RE) in the chassis are reinitialized, which leads to a complete service outage, which the system automatically recovers from.\n\n\n\nThis issue affects:\n\nJunos OS on MX, SRX and EX Series:\u00a0\n\n\n\n * all versions before 22.4R3-S8,\n * 23.2 versions before 23.2R2-S5,\n * 23.4 versions before 23.4R2-S6,\n * 24.2 versions before 24.2R2-S2,\n * 24.4 versions before 24.4R2."
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"lastModified": "2026-01-23T19:39:36.860",
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FKIE_CVE-2025-59959
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:38
Severity ?
Summary
An Untrusted Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, authenticated attacker with low privileges to cause a Denial-of-Service (DoS).
When the command 'show route < ( receive-protocol | advertising-protocol ) bgp > detail' is executed, and at least one of the routes in the intended output has specific attributes, this will cause an rpd crash and restart.
'show route ... extensive' is not affected.
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S5,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* 23.2 versions before 23.2R2-S5-EVO,
* 23.4 versions before 23.4R2-S6-EVO,
* 24.2 versions before 24.2R2-S2-EVO,
* 24.4 versions before 24.4R2-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA103148 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/ | Permissions Required |
Impacted products
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"value": "An Untrusted Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, authenticated attacker with low privileges to cause a Denial-of-Service (DoS).\n\nWhen the command \u0027show route \u003c ( receive-protocol | advertising-protocol ) bgp \u003e detail\u0027 is executed, and at least one of the routes in the intended output has specific attributes, this will cause an rpd crash and restart.\n\u0027show route ... extensive\u0027 is not affected.\n\n\n\n\nThis issue affects:\n\nJunos OS:\u00a0\n\n\n\n * all versions before 22.4R3-S8,\n * 23.2 versions before 23.2R2-S5,\n * 23.4 versions before 23.4R2-S5,\n * 24.2 versions before 24.2R2-S2,\n * 24.4 versions before 24.4R2;\n\n\n\n\nJunos OS Evolved:\n\n\n\n * all versions before 22.4R3-S8-EVO,\u00a0\n * 23.2 versions before 23.2R2-S5-EVO,\n * 23.4 versions before 23.4R2-S6-EVO,\n * 24.2 versions before 24.2R2-S2-EVO,\n * 24.4 versions before 24.4R2-EVO."
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"lastModified": "2026-01-23T19:38:55.257",
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FKIE_CVE-2025-59961
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:39
Severity ?
Summary
An Incorrect Permission Assignment for Critical Resource vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged user to write to the Unix socket used to manage the jdhcpd process, resulting in complete control over the resource.
This vulnerability allows any low-privileged user logged into the system to connect to the Unix socket and issue commands to manage the DHCP service, in essence, taking administrative control of the local DHCP server or DHCP relay.
This issue affects:
Junos OS:
* all versions before 21.2R3-S10,
* all versions of 22.2,
* from 21.4 before 21.4R3-S12,
* from 22.4 before 22.4R3-S8,
* from 23.2 before 23.2R2-S5,
* from 23.4 before 23.4R2-S6,
* from 24.2 before 24.2R2-S2,
* from 24.4 before 24.4R2,
* from 25.2 before 25.2R1-S1, 25.2R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* from 23.2 before 23.2R2-S5-EVO,
* from 23.4 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-S2-EVO,
* from 24.4 before 24.4R2-EVO,
* from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA103150 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/ | Vendor Advisory |
Impacted products
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"lang": "en",
"value": "An Incorrect Permission Assignment for Critical Resource vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged user to write to the Unix socket used to manage the jdhcpd process, resulting in complete control over the resource.\n\nThis vulnerability allows any low-privileged user logged into the system to connect to the Unix socket and issue commands to manage the DHCP service, in essence, taking administrative control of the local DHCP server or DHCP relay.\n\nThis issue affects:\n Junos OS: \n * all versions before 21.2R3-S10,\n * all versions of 22.2,\n * from 21.4 before 21.4R3-S12,\n * from 22.4 before 22.4R3-S8,\n * from 23.2 before 23.2R2-S5, \n * from 23.4 before 23.4R2-S6, \n * from 24.2 before 24.2R2-S2, \n * from 24.4 before 24.4R2, \n * from 25.2 before 25.2R1-S1, 25.2R2; \n\n\n\nJunos OS Evolved: \n * all versions before 22.4R3-S8-EVO, \n * from 23.2 before 23.2R2-S5-EVO, \n * from 23.4 before 23.4R2-S6-EVO, \n * from 24.2 before 24.2R2-S2-EVO, \n * from 24.4 before 24.4R2-EVO, \n * from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO."
}
],
"id": "CVE-2025-59961",
"lastModified": "2026-01-23T19:39:19.273",
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"tags": [
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FKIE_CVE-2025-60003
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:39
Severity ?
Summary
A Buffer Over-read vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
When an affected device receives a BGP update with a set of specific optional transitive attributes over an established peering session, rpd will crash and restart when attempting to advertise the received information to another peer.
This issue can only happen if one or both of the BGP peers of the receiving session are non-4-byte-AS capable as determined from the advertised capabilities during BGP session establishment. Junos OS and Junos OS Evolved default behavior is 4-byte-AS capable unless this has been specifically disabled by configuring:
[ protocols bgp ... disable-4byte-as ]
Established BGP sessions can be checked by executing:
show bgp neighbor <IP address> | match "4 byte AS"
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* 23.2 versions before 23.2R2-S5-EVO,
* 23.4 versions before 23.4R2-S6-EVO,
* 24.2 versions before 24.2R2-S2-EVO,
* 24.4 versions before 24.4R2-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA103166 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/ | Vendor Advisory |
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"value": "A Buffer Over-read vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nWhen an affected device receives a BGP update with a set of specific optional transitive attributes over an established peering session, rpd will crash and restart when attempting to advertise the received information to another peer.\nThis issue can only happen if one or both of the BGP peers of the receiving session are non-4-byte-AS capable as determined from the advertised capabilities during BGP session establishment. Junos OS and Junos OS Evolved default behavior is 4-byte-AS capable unless this has been specifically disabled by configuring:\n\n[ protocols bgp ...\u00a0disable-4byte-as\u00a0]\n\n\nEstablished BGP sessions can be checked by executing:\n\nshow bgp neighbor \u003cIP address\u003e | match \"4 byte AS\"\n\n\nThis issue affects:\n\nJunos OS:\u00a0\n\n * all versions before 22.4R3-S8,\n * 23.2 versions before 23.2R2-S5,\n * 23.4 versions before 23.4R2-S6,\n * 24.2 versions before 24.2R2-S2,\n * 24.4 versions before 24.4R2;\n\n\nJunos OS Evolved:\u00a0\n\n * all versions before 22.4R3-S8-EVO,\n * 23.2 versions before 23.2R2-S5-EVO,\n * 23.4 versions before 23.4R2-S6-EVO,\n * 24.2 versions before 24.2R2-S2-EVO,\n * 24.4 versions before 24.4R2-EVO."
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"lastModified": "2026-01-23T19:39:25.907",
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FKIE_CVE-2025-60011
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:39
Severity ?
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause an availability impact for downstream devices.
When an affected device receives a specific optional, transitive BGP attribute over an existing BGP session, it will be erroneously modified before propagation to peers. When the attribute is detected as malformed by the peers, these peers will most likely terminate the BGP sessions with the affected devices and thereby cause an availability impact due to the resulting routing churn.
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* 23.2 versions before 23.2R2-S5-EVO,
* 23.4 versions before 23.4R2-S6-EVO,
* 24.2 versions before 24.2R2-S2-EVO,
* 24.4 versions before 24.4R2-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA103161 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/ | Vendor Advisory |
Impacted products
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"lang": "en",
"value": "An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause an availability impact for downstream devices.\n\nWhen an affected device receives a specific optional, transitive BGP attribute over an existing BGP session, it will be erroneously modified before propagation to peers. When the attribute is detected as malformed by the peers, these peers will most likely terminate the BGP sessions with the affected devices and thereby cause an availability impact due to the resulting routing churn.\n\nThis issue affects:\n\nJunos OS:\n\n\n\n * all versions before 22.4R3-S8,\n * 23.2 versions before 23.2R2-S5\n * 23.4 versions before 23.4R2-S6,\n * 24.2 versions before 24.2R2-S2,\n * 24.4 versions before 24.4R2;\n\n\n\n\nJunos OS Evolved:\u00a0\n\n\n\n * all versions before 22.4R3-S8-EVO,\n * 23.2 versions before 23.2R2-S5-EVO,\n * 23.4 versions before 23.4R2-S6-EVO,\n * 24.2 versions before 24.2R2-S2-EVO,\n * 24.4 versions before 24.4R2-EVO."
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],
"id": "CVE-2025-60011",
"lastModified": "2026-01-23T19:39:45.920",
"metrics": {
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"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
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"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:M/U:X",
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"vulnerabilityResponseEffort": "MODERATE"
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"published": "2026-01-15T21:16:03.950",
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"tags": [
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FKIE_CVE-2025-59960
Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-01-23 19:39
Severity ?
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a DHCP client in one subnet to exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server.
By default, the DHCP relay agent inserts its own Option 82 information when forwarding client requests, optionally replacing any Option 82 information provided by the client. When a specific DHCP DISCOVER is received in 'forward-only' mode with Option 82, the device should drop the message unless 'trust-option82' is configured. Instead, the DHCP relay forwards these packets to the DHCP server unmodified, which uses up addresses in the DHCP server's address pool, ultimately leading to address pool exhaustion.
This issue affects Junos OS:
* all versions before 21.2R3-S10,
* from 21.4 before 21.4R3-S12,
* all versions of 22.2,
* from 22.4 before 22.4R3-S8,
* from 23.2 before 23.2R2-S5,
* from 23.4 before 23.4R2-S6,
* from 24.2 before 24.2R2-S2,
* from 24.4 before 24.4R2,
* from 25.2 before 25.2R1-S1, 25.2R2.
Junos OS Evolved:
* all versions before 21.4R3-S12-EVO,
* all versions of 22.2-EVO,
* from 22.4 before 22.4R3-S8-EVO,
* from 23.2 before 23.2R2-S5-EVO,
* from 23.4 before 23.4R2-S6-EVO,
* from 24.2 before 24.2R2-S2-EVO,
* from 24.4 before 24.4R2-EVO,
* from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.
References
| URL | Tags | ||
|---|---|---|---|
| sirt@juniper.net | https://kb.juniper.net/JSA103149 | Vendor Advisory | |
| sirt@juniper.net | https://supportportal.juniper.net/ | Permissions Required |
Impacted products
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CVE-2026-21921 (GCVE-0-2026-21921)
Vulnerability from cvelistv5 – Published: 2026-01-15 20:28 – Updated: 2026-01-15 20:55
VLAI?
Title
Junos OS and Junos OS Evolved: When telemetry collectors are frequently subscribing and unsubscribing to sensors chassisd or rpd will crash
Summary
A Use After Free vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker authenticated with low privileges to cause a Denial-of-Service (DoS).
When telemetry collectors are frequently subscribing and unsubscribing to sensors continuously over a long period of time, telemetry-capable processes like chassisd, rpd or mib2d will crash and restart, which - depending on the process - can cause a complete outage until the system has recovered.
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* 23.2 versions before 23.2R2-S5-EVO,
* 23.4 versions before 23.4R2-EVO.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S8
(semver)
Affected: 23.2 , < 23.2R2-S5 (semver) Affected: 23.4 , < 23.4R2 (semver) |
|||||||
|
|||||||||
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CVE-2026-21920 (GCVE-0-2026-21920)
Vulnerability from cvelistv5 – Published: 2026-01-15 20:28 – Updated: 2026-01-15 20:59
VLAI?
Title
Junos OS: SRX Series: If a specific request is processed by the DNS subsystem flowd will crash
Summary
An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX Series device configured for DNS processing, receives a specifically formatted DNS request flowd will crash and restart, which causes a service interruption until the process has recovered.
This issue affects Junos OS on SRX Series:
* 23.4 versions before 23.4R2-S5,
* 24.2 versions before 24.2R2-S1,
* 24.4 versions before 24.4R2.
This issue does not affect Junos OS versions before 23.4R1.
Severity ?
CWE
- CWE-252 - Unchecked Return Value
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
23.4 , < 23.4R2-S5
(semver)
Affected: 24.2 , < 24.2R2-S1 (semver) Affected: 24.4 , < 24.4R2 (semver) Unaffected: 0 , < 23.4R1 (semver) |
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CVE-2026-21918 (GCVE-0-2026-21918)
Vulnerability from cvelistv5 – Published: 2026-01-15 20:27 – Updated: 2026-01-15 21:13
VLAI?
Title
Junos OS: SRX and MX Series: When TCP packets occur in a specific sequence flowd crashes
Summary
A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of packets is encountered a double free happens. This causes flowd to crash and the respective FPC to restart.
This issue affects Junos OS on SRX and MX Series:
* all versions before 22.4R3-S7,
* 23.2 versions before 23.2R2-S3,
* 23.4 versions before 23.4R2-S4,
* 24.2 versions before 24.2R2.
Severity ?
CWE
- CWE-415 - Double Free
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S7
(semver)
Affected: 23.2 , < 23.2R2-S3 (semver) Affected: 23.4 , < 23.4R2-S4 (semver) Affected: 24.2 , < 24.2R2 (semver) |
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CVE-2026-21917 (GCVE-0-2026-21917)
Vulnerability from cvelistv5 – Published: 2026-01-15 20:27 – Updated: 2026-01-15 21:12
VLAI?
Title
Junos OS: SRX Series: Specifically malformed SSL packet causes FPC crash
Summary
An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart.
This issue affects Junos OS on SRX Series:
* 23.2 versions from 23.2R2-S2 before 23.2R2-S5,
* 23.4 versions from 23.4R2-S1 before 23.4R2-S5,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R1-S3, 24.4R2.
Earlier versions of Junos are also affected, but no fix is available.
Severity ?
CWE
- CWE-1286 - Improper Validation of Syntactic Correctness of Input
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
23.2R2-S2 , < 23.2R2-S5
(semver)
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CVE-2026-21914 (GCVE-0-2026-21914)
Vulnerability from cvelistv5 – Published: 2026-01-15 20:25 – Updated: 2026-01-15 20:44
VLAI?
Title
Junos OS: SRX Series: A specifically malformed GTP message will cause an FPC crash
Summary
An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (Dos).
If an SRX Series device receives a specifically malformed GPRS Tunnelling Protocol (GTP) Modify Bearer Request message, a lock is acquired and never released. This results in other threads not being able to acquire a lock themselves, causing a watchdog timeout leading to FPC crash and restart. This issue leads to a complete traffic outage until the device has automatically recovered.
This issue affects Junos OS on SRX Series:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S3,
* 24.4 versions before 24.4R2-S2,
* 25.2 versions before 25.2R1-S1, 25.2R2.
Severity ?
CWE
- CWE-667 - Improper Locking
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S8
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CVE-2026-21913 (GCVE-0-2026-21913)
Vulnerability from cvelistv5 – Published: 2026-01-15 20:25 – Updated: 2026-01-15 20:45
VLAI?
Title
Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart
Summary
An Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
On EX4000 models with 48 ports (EX4000-48T, EX4000-48P, EX4000-48MP) a high volume of traffic destined to the device will cause an FXPC crash and restart, which leads to a complete service outage until the device has automatically restarted.
The following reboot reason can be seen in the output of 'show chassis routing-engine' and as a log message:
reason=0x4000002 reason_string=0x4000002:watchdog + panic with core dump
This issue affects Junos OS on EX4000-48T, EX4000-48P and EX4000-48MP:
* 24.4 versions before 24.4R2,
* 25.2 versions before 25.2R1-S2, 25.2R2.
This issue does not affect versions before 24.4R1 as the first Junos OS version for the EX4000 models was 24.4R1.
Severity ?
CWE
- CWE-1419 - Incorrect Initialization of Resource
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
24.4 , < 24.4R2
(semver)
Affected: 25.2 , < 25.2R1-S2, 25.2R2 (semver) Unaffected: 0 , < 24.4R1 (semver) |
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CVE-2026-21921 (GCVE-0-2026-21921)
Vulnerability from nvd – Published: 2026-01-15 20:28 – Updated: 2026-01-15 20:55
VLAI?
Title
Junos OS and Junos OS Evolved: When telemetry collectors are frequently subscribing and unsubscribing to sensors chassisd or rpd will crash
Summary
A Use After Free vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker authenticated with low privileges to cause a Denial-of-Service (DoS).
When telemetry collectors are frequently subscribing and unsubscribing to sensors continuously over a long period of time, telemetry-capable processes like chassisd, rpd or mib2d will crash and restart, which - depending on the process - can cause a complete outage until the system has recovered.
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* 23.2 versions before 23.2R2-S5-EVO,
* 23.4 versions before 23.4R2-EVO.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S8
(semver)
Affected: 23.2 , < 23.2R2-S5 (semver) Affected: 23.4 , < 23.4R2 (semver) |
|||||||
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CVE-2026-21920 (GCVE-0-2026-21920)
Vulnerability from nvd – Published: 2026-01-15 20:28 – Updated: 2026-01-15 20:59
VLAI?
Title
Junos OS: SRX Series: If a specific request is processed by the DNS subsystem flowd will crash
Summary
An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX Series device configured for DNS processing, receives a specifically formatted DNS request flowd will crash and restart, which causes a service interruption until the process has recovered.
This issue affects Junos OS on SRX Series:
* 23.4 versions before 23.4R2-S5,
* 24.2 versions before 24.2R2-S1,
* 24.4 versions before 24.4R2.
This issue does not affect Junos OS versions before 23.4R1.
Severity ?
CWE
- CWE-252 - Unchecked Return Value
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
23.4 , < 23.4R2-S5
(semver)
Affected: 24.2 , < 24.2R2-S1 (semver) Affected: 24.4 , < 24.4R2 (semver) Unaffected: 0 , < 23.4R1 (semver) |
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CVE-2026-21918 (GCVE-0-2026-21918)
Vulnerability from nvd – Published: 2026-01-15 20:27 – Updated: 2026-01-15 21:13
VLAI?
Title
Junos OS: SRX and MX Series: When TCP packets occur in a specific sequence flowd crashes
Summary
A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of packets is encountered a double free happens. This causes flowd to crash and the respective FPC to restart.
This issue affects Junos OS on SRX and MX Series:
* all versions before 22.4R3-S7,
* 23.2 versions before 23.2R2-S3,
* 23.4 versions before 23.4R2-S4,
* 24.2 versions before 24.2R2.
Severity ?
CWE
- CWE-415 - Double Free
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S7
(semver)
Affected: 23.2 , < 23.2R2-S3 (semver) Affected: 23.4 , < 23.4R2-S4 (semver) Affected: 24.2 , < 24.2R2 (semver) |
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CVE-2026-21917 (GCVE-0-2026-21917)
Vulnerability from nvd – Published: 2026-01-15 20:27 – Updated: 2026-01-15 21:12
VLAI?
Title
Junos OS: SRX Series: Specifically malformed SSL packet causes FPC crash
Summary
An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart.
This issue affects Junos OS on SRX Series:
* 23.2 versions from 23.2R2-S2 before 23.2R2-S5,
* 23.4 versions from 23.4R2-S1 before 23.4R2-S5,
* 24.2 versions before 24.2R2-S2,
* 24.4 versions before 24.4R1-S3, 24.4R2.
Earlier versions of Junos are also affected, but no fix is available.
Severity ?
CWE
- CWE-1286 - Improper Validation of Syntactic Correctness of Input
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
23.2R2-S2 , < 23.2R2-S5
(semver)
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CVE-2026-21914 (GCVE-0-2026-21914)
Vulnerability from nvd – Published: 2026-01-15 20:25 – Updated: 2026-01-15 20:44
VLAI?
Title
Junos OS: SRX Series: A specifically malformed GTP message will cause an FPC crash
Summary
An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (Dos).
If an SRX Series device receives a specifically malformed GPRS Tunnelling Protocol (GTP) Modify Bearer Request message, a lock is acquired and never released. This results in other threads not being able to acquire a lock themselves, causing a watchdog timeout leading to FPC crash and restart. This issue leads to a complete traffic outage until the device has automatically recovered.
This issue affects Junos OS on SRX Series:
* all versions before 22.4R3-S8,
* 23.2 versions before 23.2R2-S5,
* 23.4 versions before 23.4R2-S6,
* 24.2 versions before 24.2R2-S3,
* 24.4 versions before 24.4R2-S2,
* 25.2 versions before 25.2R1-S1, 25.2R2.
Severity ?
CWE
- CWE-667 - Improper Locking
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 22.4R3-S8
(semver)
Affected: 23.2 , < 23.2R2-S5 (semver) Affected: 23.4 , < 23.4R2-S6 (semver) Affected: 24.2 , < 24.2R2-S3 (semver) Affected: 24.4 , < 24.4R2-S2 (semver) Affected: 25.2 , < 25.2R1-S1, 25.2R2 (semver) |
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CVE-2026-21913 (GCVE-0-2026-21913)
Vulnerability from nvd – Published: 2026-01-15 20:25 – Updated: 2026-01-15 20:45
VLAI?
Title
Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart
Summary
An Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
On EX4000 models with 48 ports (EX4000-48T, EX4000-48P, EX4000-48MP) a high volume of traffic destined to the device will cause an FXPC crash and restart, which leads to a complete service outage until the device has automatically restarted.
The following reboot reason can be seen in the output of 'show chassis routing-engine' and as a log message:
reason=0x4000002 reason_string=0x4000002:watchdog + panic with core dump
This issue affects Junos OS on EX4000-48T, EX4000-48P and EX4000-48MP:
* 24.4 versions before 24.4R2,
* 25.2 versions before 25.2R1-S2, 25.2R2.
This issue does not affect versions before 24.4R1 as the first Junos OS version for the EX4000 models was 24.4R1.
Severity ?
CWE
- CWE-1419 - Incorrect Initialization of Resource
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
24.4 , < 24.4R2
(semver)
Affected: 25.2 , < 25.2R1-S2, 25.2R2 (semver) Unaffected: 0 , < 24.4R1 (semver) |
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"value": "An Incorrect Initialization of Resource vulnerability in the Internal Device Manager (IDM) of Juniper Networks Junos OS on EX4000 models allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nOn EX4000 models with 48 ports (EX4000-48T, EX4000-48P, EX4000-48MP)\u00a0a high volume of traffic destined to the device will cause an FXPC crash and restart, which leads to a complete service outage until the device has automatically restarted.\n\n\n\n\nThe following reboot reason can be seen in the output of \u0027show chassis routing-engine\u0027 and as a log message:\n\n\u00a0 reason=0x4000002 reason_string=0x4000002:watchdog + panic with core dump \n\n\n\n\nThis issue affects Junos OS on EX4000-48T, EX4000-48P and EX4000-48MP:\n\n\n\n * 24.4 versions before 24.4R2,\n * 25.2 versions before 25.2R1-S2, 25.2R2.\n\n\n\n\nThis issue does not affect versions before 24.4R1 as the first Junos OS version for the EX4000 models was 24.4R1."
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"title": "Junos OS: EX4000: A high volume of traffic destined to the device leads to a crash and restart",
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