Protection mechanism failure in Junos OS - CVE-2025-52951
Published: July 18, 2025
Vulnerability identifier: #VU113045
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-52951
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to corrupt data.
The vulnerability exists due to protection mechanism failure error in IPv6 firewall filter. A remote non-authenticated attacker can an interface to effectively bypass any firewall filtering configured on the interface.
Affected software
Junos OS
How to mitigate CVE-2025-52951
Install updates from vendor's website.
Junos OS - addressed in versions 21.2R3-S9, 21.4R3-S11, 22.2R3-S7, 22.4R3-S7, 23.2R2-S4, 23.4R2-S5, 24.2R2-S1, 24.4R1-S2, 24.4R2, 25.2R1