CVE-2026-102055 Memory corruption in Junos OS
An attacker can execute arbitrary code or cause denial of service on Juniper MX/PTX devices via a stack-based buffer overflow in CFM.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102055?
CVE-2026-102055 is a high-severity memory corruption vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Stack-based Buffer Overflow vulnerability in the cfmd process of Juniper Networks Junos OS on MX Series and Junos OS Evolved on PTX Series platforms allows an unauthenticated adjacent-network attacker to execute arbitrary code as root or cause denial of service via a specific CFM Message sent to a configured down-MEP with enhanced CFM mode enabled.
Weakness: CWE-121
Which versions are affected by CVE-2026-102055?
How do I fix CVE-2026-102055?
No fix has been published for CVE-2026-102055 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-102055 being exploited?
There is no known exploitation of CVE-2026-102055 in the wild and no public exploit code.
Sources
Also known as GHSA-xp67-wg64-pvrf.