CVE-2025-52952 – Juniper Networks Junos OS CFM Daemon Out-of-Bounds Write Vulnerability

CVE ID : CVE-2025-52952

Published : July 11, 2025, 3:15 p.m. | 59 minutes ago

Description : An Out-of-bounds Write vulnerability in the connectivity fault management (CFM) daemon of Juniper Networks Junos OS on MX Series with MPC-BUILTIN, MPC1 through MPC9 line cards allows an unauthenticated adjacent attacker to send a malformed packet to the device, leading to an FPC crash and restart, resulting in a Denial of Service (DoS).

Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

This issue affects Juniper Networks:
Junos OS:
* All versions before 22.2R3-S1,
* from 22.4 before 22.4R2.

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Severity: 6.5 | MEDIUM

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