What is CVE-2025-52960?

CVE-2025-52960 is a medium-severity vulnerability in Juniper Junos, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.9/10. Published 2025-10-09.

How severe is CVE-2025-52960?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Buffer overflow in Juniper Junos

CVE-2025-52960

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 S…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (21.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Junos — versions 22.4, 23.2, 23.4
Juniper Mx10004
Juniper Mx10008
Juniper Mx2008
Juniper Mx2010
Juniper Mx2020
Juniper Mx204
Juniper Mx240
Juniper Mx304
Juniper Mx480

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

sirt@juniper.net (vendor-advisory, Vendor Advisory)
sirt@juniper.net (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-52960?: CVE-2025-52960 is a medium-severity vulnerability in Juniper Junos, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.9/10. Published 2025-10-09.
How severe is CVE-2025-52960?: Medium severity. CVSS v3 base score is 5.9 out of 10.