p PatchFirst

CVE-2026-102055

CVE-2026-102055 · Junos OS and Junos OS Evolved: MX Series, PTX Series: An attacker causes remote code execution and denial of service when enhanced CFM is enabled

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A Stack-based Buffer Overflow vulnerability in the cfmd process of Juniper Networks Junos OS on MX Series and Junos OS Evolved on PTX Series platforms allows an unauthenticated adjacent-network attacker to execute arbitrary code as root or cause denial of service via a specific CFM Message sent to a configured down-MEP with enhanced CFM mode enabled.

CVSS 8.7 · High · EPSS 0.3% · Fix available

Published
Updated

Affected products and versions

  • junos os

    Versions
    • ≥ 0, < 23.2R2-S7.7: Affected (custom)
    • ≥ 23.4, < 23.4R2-S8.13: Affected (custom)
    • ≥ 24.2, < 24.2R2-S5.5: Affected (custom)
    • ≥ 24.4, < 24.4R2-S5: Affected (custom)
    • ≥ 25.2, < 25.2R2-S2: Affected (custom)
    • ≥ 25.4, < 25.4R1-S3: Affected (custom)
    • ≥ 26.2, < 26.2R1-S2: Affected (custom)

    Update to 23.2R2-S7.7

  • junos os evolved

    Versions
    • ≥ 0, < 23.2R2-S7.7-EVO: Affected (custom)
    • ≥ 23.4, < 23.4R2-S8.11-EVO: Affected (custom)
    • ≥ 24.2, < 24.2R2-S5.6-EVO: Affected (custom)
    • ≥ 24.4, < 24.4R2-S5-EVO: Affected (custom)
    • ≥ 25.2, < 25.2R2-S2-EVO: Affected (custom)
    • ≥ 25.4, < 25.4R1-S3-EVO: Affected (custom)
    • ≥ 26.2, < 26.2R1-S2-EVO: Affected (custom)
    • 23.4X100: Affected (custom)
    • ≥ 25.2X100, < 25.2X100-D35-EVO: Affected (custom)
    • ≥ 25.4X300, < 25.4X300-D40-EVO: Affected (custom)

    Update to 23.2R2-S7.7-EVO; Update to 24.2R2-S5.6-EVO

Original sources

Check your server →