Common Weakness Enumeration
CWE-158
AllowedImproper Neutralization of Null Byte or NUL Character
Abstraction: Variant · Status: Incomplete
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes NUL characters or null bytes when they are sent to a downstream component.
44 vulnerabilities reference this CWE, most recent first.
CVE-2025-55113 (GCVE-0-2025-55113)
Vulnerability from cvelistv5 – Published: 2025-09-16 12:20 – Updated: 2026-02-26 17:48
VLAI
EPSS
VEX
Title
BMC Control-M/Agent unescaped NULL byte in access control list checks
Summary
If the Access Control List is enforced by the Control-M/Agent and the C router is in use (default in Out-of-support Control-M/Agent versions 9.0.18 to 9.0.20 and potentially earlier unsupported versions; non-default but configurable using the JAVA_AR setting in newer versions), the verification stops at the first NULL byte encountered in the email address referenced in the client certificate. An attacker could bypass configured ACLs by using a specially crafted certificate.
Severity
9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bmcapps.my.site.com/casemgmt/sc_Knowledge… | vendor-advisory |
| https://bmcapps.my.site.com/casemgmt/sc_Knowledge… | mitigation |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BMC | Control-M/Agent |
Affected:
9.0.22.000
(semver)
Affected: 9.0.21 (semver) Affected: 9.0.20 (semver) Affected: 9.0.19 (semver) Affected: 9.0.18 (semver) |
Credits
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CVE-2025-47812 (GCVE-0-2025-47812)
Vulnerability from cvelistv5 – Published: 2025-07-10 00:00 – Updated: 2026-02-26 17:50
VLAI
EPSS
VEX
Summary
In Wing FTP Server before 7.4.4. the user and admin web interfaces mishandle '\0' bytes, ultimately allowing injection of arbitrary Lua code into user session files. This can be used to execute arbitrary system commands with the privileges of the FTP service (root or SYSTEM by default). This is thus a remote code execution vulnerability that guarantees a total server compromise. This is also exploitable via anonymous FTP accounts.
Severity
10 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
6 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wftpserver | Wing FTP Server |
Affected:
0 , < 7.4.4
(custom)
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CVE-2025-14388 (GCVE-0-2025-14388)
Vulnerability from cvelistv5 – Published: 2025-12-23 09:20 – Updated: 2026-04-08 17:31
VLAI
EPSS
VEX
Title
PhastPress <= 3.7 - Unauthenticated Arbitrary File Read via Null Byte Injection
Summary
The PhastPress plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Read via null byte injection in all versions up to, and including, 3.7. This is due to a discrepancy between the extension validation in `getExtensionForURL()` which operates on URL-decoded paths, and `appendNormalized()` which strips everything after a null byte before constructing the filesystem path. This makes it possible for unauthenticated attackers to read arbitrary files from the webroot, including wp-config.php, by appending a double URL-encoded null byte (%2500) followed by an allowed extension (.txt) to the file path.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
6 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| kiboit | PhastPress |
Affected:
0 , ≤ 3.7
(semver)
|
Credits
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CVE-2025-9648 (GCVE-0-2025-9648)
Vulnerability from cvelistv5 – Published: 2025-09-29 11:47 – Updated: 2025-09-29 12:53 X_Open Source
VLAI
EPSS
VEX
Title
Denial of Service in CivetWeb
Summary
A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request containing a null byte in the payload, the server enters an infinite loop during form data parsing. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests.
This issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2025/09/CVE-2025-9648 | third-party-advisory |
| https://github.com/civetweb/civetweb | product |
| https://github.com/civetweb/civetweb/issues/1348 | issue-tracking |
| https://github.com/civetweb/civetweb/commit/782e1… | patch |
Impacted products
Date Public
2025-09-29 09:55
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CVE-2024-10921 (GCVE-0-2024-10921)
Vulnerability from cvelistv5 – Published: 2024-11-14 16:04 – Updated: 2024-11-15 09:45
VLAI
EPSS
VEX
Title
Improper neutralization of null bytes may lead to buffer over-reads in MongoDB Server
Summary
An authorized user may trigger crashes or receive the contents of buffer over-reads of Server memory by issuing specially crafted requests that construct malformed BSON in the MongoDB Server. This issue affects MongoDB Server v5.0 versions prior to 5.0.30 , MongoDB Server v6.0 versions prior to 6.0.19, MongoDB Server v7.0 versions prior to 7.0.15 and MongoDB Server v8.0 versions prior to and including 8.0.2.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB Inc | MongoDB Server |
Affected:
5.0 , < 5.0.30
(custom)
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Date Public
2024-11-14 16:02
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CVE-2024-9026 (GCVE-0-2024-9026)
Vulnerability from cvelistv5 – Published: 2024-10-08 04:07 – Updated: 2025-11-03 22:33
VLAI
EPSS
VEX
Title
PHP-FPM logs from children may be altered
Summary
In PHP versions 8.1.* before 8.1.30, 8.2.* before 8.2.24, 8.3.* before 8.3.12, when using PHP-FPM SAPI and it is configured to catch workers output through catch_workers_output = yes, it may be possible to pollute the final log or remove up to 4 characters from the log messages by manipulating log message content. Additionally, if PHP-FPM is configured to use syslog output, it may be possible to further remove log data using the same vulnerability.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
2 products
Date Public
2024-09-27 17:50
Credits
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CVE-2024-0408 (GCVE-0-2024-0408)
Vulnerability from cvelistv5 – Published: 2024-01-18 15:40 – Updated: 2025-11-20 07:08
VLAI
EPSS
VEX
Title
Xorg-x11-server: selinux unlabeled glx pbuffer
Summary
A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
13 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:0320 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2169 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2170 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2995 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2996 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2024-0408 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2257689 | issue-trackingx_refsource_REDHAT |
| https://lists.debian.org/debian-lts-announce/2024… | x_transferred |
| https://lists.fedoraproject.org/archives/list/pac… | x_transferred |
| https://lists.fedoraproject.org/archives/list/pac… | x_transferred |
| https://lists.fedoraproject.org/archives/list/pac… | x_transferred |
| https://security.gentoo.org/glsa/202401-30 | x_transferred |
| https://security.netapp.com/advisory/ntap-2024030… | x_transferred |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
21.1.0 , < 21.1.11
(semver)
|
|||
| Red Hat | Red Hat Enterprise Linux 7 |
Unaffected:
0:1.20.4-27.el7_9 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:7::workstation cpe:/o:redhat:enterprise_linux:7::server cpe:/o:redhat:enterprise_linux:7::client cpe:/o:redhat:enterprise_linux:7::computenode |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:1.20.11-22.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::crb cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:21.1.3-15.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.20.11-24.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/a:redhat:enterprise_linux:9::crb |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:22.1.9-5.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
Date Public
2024-01-16 00:00
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CVE-2023-5719 (GCVE-0-2023-5719)
Vulnerability from cvelistv5 – Published: 2023-11-06 19:33 – Updated: 2025-01-16 21:26
VLAI
EPSS
VEX
Title
Red Lion Crimson Improper Neutralization of Null Byte or NUL Character
Summary
The Crimson 3.2 Windows-based configuration tool allows users with administrative access to define new passwords for users and to download the resulting security configuration to a device. If such a password contains the percent (%) character, invalid values will be included, potentially truncating the string if a NUL is encountered. If the simplified password is not detected by the administrator, the device might be left in a vulnerable state as a result of more-easily compromised credentials. Note that passwords entered via the Crimson system web server do not suffer from this vulnerability.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
Impacted products
Date Public
2023-11-02 17:00
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CVE-2022-31223 (GCVE-0-2022-31223)
Vulnerability from cvelistv5 – Published: 2022-09-12 18:35 – Updated: 2024-09-16 22:36
VLAI
EPSS
VEX
Summary
Dell BIOS versions contain an Improper Neutralization of Null Byte vulnerability. A local authenticated administrator user could potentially exploit this vulnerability by sending unexpected null bytes in order to read memory on the system.
Severity
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/000202196 | x_refsource_MISC |
Impacted products
Date Public
2022-08-05 00:00
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CVE-2022-20813 (GCVE-0-2022-20813)
Vulnerability from cvelistv5 – Published: 2022-07-06 20:30 – Updated: 2024-11-06 16:11
VLAI
EPSS
VEX
Title
Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities
Summary
Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.
Severity
9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco TelePresence Video Communication Server (VCS) Expressway |
Affected:
n/a
|
Date Public
2022-07-06 00:00
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Mitigation
Developers should anticipate that null characters or null bytes will be injected/removed/manipulated in the input vectors of their product. Use an appropriate combination of denylists and allowlists to ensure only valid, expected and appropriate input is processed by the system.
Mitigation MIT-5
Implementation
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation MIT-20
Implementation
Strategy: Input Validation
Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
CAPEC-52: Embedding NULL Bytes
An adversary embeds one or more null bytes in input to the target software. This attack relies on the usage of a null-valued byte as a string terminator in many environments. The goal is for certain components of the target software to stop processing the input when it encounters the null byte(s).
CAPEC-53: Postfix, Null Terminate, and Backslash
If a string is passed through a filter of some kind, then a terminal NULL may not be valid. Using alternate representation of NULL allows an adversary to embed the NULL mid-string while postfixing the proper data so that the filter is avoided. One example is a filter that looks for a trailing slash character. If a string insertion is possible, but the slash must exist, an alternate encoding of NULL in mid-string may be used.