CVE-2026-101981 Junos OS and Junos OS Evolved: An adjacent LDP peer causes routing-engine compromise when LDP is enabled
An adjacent LDP peer can execute arbitrary code or crash the routing daemon via a malformed message when LDP is enabled.
- 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-2026-101981?
CVE-2026-101981 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 routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent LDP peer to cause an rpd crash or execute arbitrary code via a malformed LDP Label Mapping message.
Weakness: CWE-121
Which versions are affected by CVE-2026-101981?
How do I fix CVE-2026-101981?
No fix has been published for CVE-2026-101981 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-2026-101981 being exploited?
There is no known exploitation of CVE-2026-101981 in the wild and no public exploit code.
Sources
Also known as GHSA-3wvx-42hv-x5q4.