Buffer overflow in Junos OS - CVE-2025-52960
Published: October 13, 2025
Vulnerability identifier: #VU116932
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-52960
CWE-ID: CWE-120
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
A Buffer Copy without Checking Size of Input vulnerability in the Session Initialization Protocol (SIP) ALG of Juniper Networks Junos OS on MX Series and SRX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
When memory utilization is high, and specific SIP packets are received, flowd crashes.
Affected software
Junos OS
How to mitigate CVE-2025-52960
Install updates from vendor's website.
Junos OS - addressed in versions 22.4R3-S7, 23.2R2-S4, 23.4R2-S5, 24.2R2, 24.4R1