Vulnerability in Juniper Junos
CVE-2025-52951
A Protection Mechanism Failure vulnerability in kernel filter processing of Juniper Networks Junos OS allows an attacker sending IPv6 traffic destined to the device to effectively bypass any firewall filtering configured on the interface. …
EPSS: 0.003 (23.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
Affected products
- Juniper Junos — versions 21.2, 21.4, 22.2
- Juniper Networks Junos Os — versions 0, 21.4, 22.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sirt@juniper.net (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-52951?
- CVE-2025-52951 is a medium-severity vulnerability in Juniper Junos, classified under Protection Mechanism Failure. CVSS score: 5.8/10. Published 2025-07-11.
- How severe is CVE-2025-52951?
- Medium severity. CVSS v3 base score is 5.8 out of 10.
- Is CVE-2025-52951 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.