NCSC-2026-0017

Vulnerability from csaf_ncscnl - Published: 2026-01-16 10:07 - Updated: 2026-01-16 10:07
Summary
Kwetsbaarheden verholpen in Juniper Networks JunOS

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten
Juniper heeft kwetsbaarheden verholpen in Junos OS (Specifiek voor SRX en MX Series apparaten).
Interpretaties
De kwetsbaarheden in Junos OS omvatten verschillende problemen, waaronder clickjacking, Denial-of-Service (DoS) door malformed packets, en kwetsbaarheden die kunnen worden misbruikt door ongeauthenticeerde aanvallers. Deze kwetsbaarheden kunnen leiden tot serviceonderbrekingen, netwerkinstabiliteit en ongeautoriseerde acties door gebruikers. De technische details van deze kwetsbaarheden vereisen aandacht van beveiligingsbeheerders om de impact op hun netwerkinfrastructuur te beoordelen.
Oplossingen
Juniper heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans
medium
Schade
medium
CWE-121
Stack-based Buffer Overflow
CWE-126
Buffer Over-read
CWE-252
Unchecked Return Value
CWE-327
Use of a Broken or Risky Cryptographic Algorithm
CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-401
Missing Release of Memory after Effective Lifetime
CWE-415
Double Free
CWE-416
Use After Free
CWE-476
NULL Pointer Dereference
CWE-665
Improper Initialization
CWE-667
Improper Locking
CWE-682
Incorrect Calculation
CWE-732
Incorrect Permission Assignment for Critical Resource
CWE-754
Improper Check for Unusual or Exceptional Conditions
CWE-755
Improper Handling of Exceptional Conditions
CWE-822
Untrusted Pointer Dereference
CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-908
Use of Uninitialized Resource
CWE-1021
Improper Restriction of Rendered UI Layers or Frames
CWE-1286
Improper Validation of Syntactic Correctness of Input
CWE-1419
Incorrect Initialization of Resource
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        "text": "Use of Uninitialized Resource",
        "title": "CWE-908"
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        "text": "Improper Restriction of Rendered UI Layers or Frames",
        "title": "CWE-1021"
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        "url": "https://supportportal.juniper.net/s/article/2026-01-Security-Bulletin-Junos-OS-Evolved-A-Linux-kernel-vulnerability-in-the-HID-driver-allows-an-attacker-to-read-information-from-the-HID-Report-buffer-CVE-2024-50302"
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          "text": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M",
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        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-0203 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-0203.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-0203"
    },
    {
      "cve": "CVE-2026-21903",
      "cwe": {
        "id": "CWE-121",
        "name": "Stack-based Buffer Overflow"
      },
      "notes": [
        {
          "category": "other",
          "text": "Stack-based Buffer Overflow",
          "title": "CWE-121"
        },
        {
          "category": "description",
          "text": "A Stack-based Buffer Overflow vulnerability in Juniper Networks\u0027 Junos OS enables low-privileged attackers to trigger Denial-of-Service conditions by subscribing to telemetry sensors, affecting specific OS versions.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21903 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21903.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21903"
    },
    {
      "cve": "CVE-2026-21906",
      "cwe": {
        "id": "CWE-755",
        "name": "Improper Handling of Exceptional Conditions"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Handling of Exceptional Conditions",
          "title": "CWE-755"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks\u0027 Junos OS on SRX Series allows unauthenticated attackers to crash the packet forwarding engine via a specific ICMP packet sent through a GRE tunnel, causing traffic loss.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Red",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21906 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21906.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21906"
    },
    {
      "cve": "CVE-2026-21914",
      "cwe": {
        "id": "CWE-667",
        "name": "Improper Locking"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Locking",
          "title": "CWE-667"
        },
        {
          "category": "description",
          "text": "An Improper Locking vulnerability in the GTP plugin of Juniper Networks Junos OS on SRX Series can be exploited by unauthenticated attackers, leading to Denial-of-Service due to lock management failures.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21914 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21914.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21914"
    },
    {
      "cve": "CVE-2026-21917",
      "cwe": {
        "id": "CWE-1286",
        "name": "Improper Validation of Syntactic Correctness of Input"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Validation of Syntactic Correctness of Input",
          "title": "CWE-1286"
        },
        {
          "category": "description",
          "text": "A vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows unauthenticated attackers to cause a Denial-of-Service (DoS) by sending malformed SSL packets, leading to device crashes.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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:A/V:X/RE:M/U:X",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21917 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21917.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21917"
    },
    {
      "cve": "CVE-2026-21920",
      "cwe": {
        "id": "CWE-252",
        "name": "Unchecked Return Value"
      },
      "notes": [
        {
          "category": "other",
          "text": "Unchecked Return Value",
          "title": "CWE-252"
        },
        {
          "category": "description",
          "text": "An Unchecked Return Value vulnerability in the DNS module of Juniper Networks Junos OS on SRX Series can allow unauthenticated attackers to cause Denial-of-Service (DoS) through specially crafted DNS requests.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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:A/V:X/RE:M/U:X",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21920 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21920.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21920"
    },
    {
      "cve": "CVE-2025-59959",
      "cwe": {
        "id": "CWE-822",
        "name": "Untrusted Pointer Dereference"
      },
      "notes": [
        {
          "category": "other",
          "text": "Untrusted Pointer Dereference",
          "title": "CWE-822"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks\u0027 Junos OS and Junos OS Evolved allows local, authenticated attackers to execute a command that causes a Denial-of-Service by crashing the routing protocol daemon under specific conditions.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-59959 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-59959.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2025-59959"
    },
    {
      "cve": "CVE-2025-59960",
      "cwe": {
        "id": "CWE-754",
        "name": "Improper Check for Unusual or Exceptional Conditions"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Check for Unusual or Exceptional Conditions",
          "title": "CWE-754"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper\u0027s DHCP service allows clients to exhaust address pools across subnets, leading to a Denial of Service on the DHCP server due to improper Option 82 handling in specific configurations.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:H/AU:Y/R:U/V:C/RE:M/U:Amber",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-59960 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-59960.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2025-59960"
    },
    {
      "cve": "CVE-2025-59961",
      "cwe": {
        "id": "CWE-732",
        "name": "Incorrect Permission Assignment for Critical Resource"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Permission Assignment for Critical Resource",
          "title": "CWE-732"
        },
        {
          "category": "description",
          "text": "A vulnerability in the Juniper DHCP daemon allows low-privileged local users to gain administrative control over the DHCP service, impacting multiple versions of Junos OS and Junos OS Evolved.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:L/AU:Y/R:A/V:C/RE:M/U:Green",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-59961 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-59961.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2025-59961"
    },
    {
      "cve": "CVE-2025-60003",
      "cwe": {
        "id": "CWE-126",
        "name": "Buffer Over-read"
      },
      "notes": [
        {
          "category": "other",
          "text": "Buffer Over-read",
          "title": "CWE-126"
        },
        {
          "category": "description",
          "text": "A Buffer Over-read vulnerability in Juniper Networks\u0027 Junos OS allows unauthenticated attackers to crash the routing protocol daemon (rpd) via specific BGP updates from non-4-byte-AS capable peers, leading to a Denial-of-Service (DoS).",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-60003 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-60003.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2025-60003"
    },
    {
      "cve": "CVE-2025-60011",
      "cwe": {
        "id": "CWE-754",
        "name": "Improper Check for Unusual or Exceptional Conditions"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Check for Unusual or Exceptional Conditions",
          "title": "CWE-754"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks\u0027 Junos OS allows unauthenticated attackers to disrupt BGP sessions, affecting the availability of downstream devices through malformed attributes.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "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/AU:Y/R:U/RE:M",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-60011 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2025/cve-2025-60011.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2025-60011"
    },
    {
      "cve": "CVE-2026-21908",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "other",
          "text": "Use After Free",
          "title": "CWE-416"
        },
        {
          "category": "description",
          "text": "A Use After Free vulnerability in Juniper Networks\u0027 802.1X authentication daemon could allow an authenticated attacker to crash the process or execute arbitrary code during port authorization changes.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/RE:M/U:Green",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21908 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21908.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21908"
    },
    {
      "cve": "CVE-2026-21909",
      "cwe": {
        "id": "CWE-401",
        "name": "Missing Release of Memory after Effective Lifetime"
      },
      "notes": [
        {
          "category": "other",
          "text": "Missing Release of Memory after Effective Lifetime",
          "title": "CWE-401"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks\u0027 Junos OS and Junos OS Evolved allows unauthenticated attackers to exploit a memory leak in the routing protocol daemon, resulting in a Denial of Service condition.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Green",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21909 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21909.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21909"
    },
    {
      "cve": "CVE-2026-21921",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "other",
          "text": "Use After Free",
          "title": "CWE-416"
        },
        {
          "category": "description",
          "text": "A Use After Free vulnerability in Juniper Networks\u0027 Junos OS allows low-privileged attackers to exploit telemetry sensor subscriptions, resulting in Denial-of-Service by crashing critical processes.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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:A/V:X/RE:M/U:X",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21921 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21921.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21921"
    },
    {
      "cve": "CVE-2024-50302",
      "cwe": {
        "id": "CWE-665",
        "name": "Improper Initialization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Initialization",
          "title": "CWE-665"
        },
        {
          "category": "other",
          "text": "Use of Uninitialized Resource",
          "title": "CWE-908"
        },
        {
          "category": "description",
          "text": "Multiple updates across SUSE Linux Enterprise kernels (15 SP2 to SP6) and Linux Kernel versions addressed various security vulnerabilities, including use-after-free issues, memory leaks, and specific bugs in network handling and Bluetooth functionalities.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2024-50302 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2024/cve-2024-50302.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2024-50302"
    },
    {
      "cve": "CVE-2026-21911",
      "cwe": {
        "id": "CWE-682",
        "name": "Incorrect Calculation"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Calculation",
          "title": "CWE-682"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks Junos OS Evolved\u0027s Layer 2 Control Protocol Daemon allows unauthenticated attackers to disrupt MAC learning, resulting in high CPU usage and excessive logging.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Amber",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21911 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21911.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21911"
    },
    {
      "cve": "CVE-2026-21913",
      "cwe": {
        "id": "CWE-1419",
        "name": "Incorrect Initialization of Resource"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Initialization of Resource",
          "title": "CWE-1419"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks Junos OS on EX4000 models allows unauthenticated attackers to cause Denial-of-Service by overwhelming the device with traffic, resulting in service outages.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21913 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21913.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21913"
    },
    {
      "cve": "CVE-2026-21910",
      "cwe": {
        "id": "CWE-754",
        "name": "Improper Check for Unusual or Exceptional Conditions"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Check for Unusual or Exceptional Conditions",
          "title": "CWE-754"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks Junos OS on EX4k and QFX5k Series platforms allows unauthenticated attackers to cause Denial of Service by flapping an interface, resulting in dropped traffic between specific VXLAN Network Identifiers.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M/U:Green",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21910 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21910.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21910"
    },
    {
      "cve": "CVE-2026-21912",
      "cwe": {
        "id": "CWE-367",
        "name": "Time-of-check Time-of-use (TOCTOU) Race Condition"
      },
      "notes": [
        {
          "category": "other",
          "text": "Time-of-check Time-of-use (TOCTOU) Race Condition",
          "title": "CWE-367"
        },
        {
          "category": "description",
          "text": "A TOCTOU race condition vulnerability in Juniper Networks Junos OS allows low-privileged attackers to reset specific line cards, potentially causing further system crashes.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M/U:Amber",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21912 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21912.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21912"
    },
    {
      "cve": "CVE-2026-21905",
      "cwe": {
        "id": "CWE-835",
        "name": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
      },
      "notes": [
        {
          "category": "other",
          "text": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
          "title": "CWE-835"
        },
        {
          "category": "description",
          "text": "A vulnerability in Juniper Networks Junos OS allows unauthenticated attackers to crash the flow management process via specific TCP SIP messages, leading to a Denial of Service on affected SRX and MX Series devices.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Amber",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21905 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21905.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21905"
    },
    {
      "cve": "CVE-2026-21918",
      "cwe": {
        "id": "CWE-415",
        "name": "Double Free"
      },
      "notes": [
        {
          "category": "other",
          "text": "Double Free",
          "title": "CWE-415"
        },
        {
          "category": "description",
          "text": "A Double Free vulnerability in Juniper Networks\u0027 Junos OS on SRX and MX Series allows unauthenticated attackers to exploit TCP session establishment, leading to Denial-of-Service across multiple software versions.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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:A/V:X/RE:M/U:X",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21918 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21918.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-21918"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.