Origin validation error in Junos OS - CVE-2025-59957
Published: October 13, 2025
Vulnerability identifier: #VU116939
CSH Severity: Medium
CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-59957
CWE-ID: CWE-346
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local non-authenticated attacker to execute arbitrary code.
The vulnerability exists due to origin validation error error in an insufficient protected file. A local non-authenticated attacker can the device to create a backdoor which allows complete control of the system.
Affected software
Junos OS
How to mitigate CVE-2025-59957
Install updates from vendor's website.
Junos OS - addressed in versions 21.4R3, 22.2R3-S3, 22.3R1