CVE-2026-102043 Junos OS and Junos OS Evolved: An attacker causes a routing-process crash when MPLS-TE fast reroute is enabled
An adjacent attacker can crash the routing process in Juniper Junos OS via MPLS-TE fast-reroute signaling due to a numeric truncation error.
- 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-2026-102043?
CVE-2026-102043 is a high-severity 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 Numeric Truncation Error vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker to crash the routing process via MPLS-TE fast-reroute signaling.
Weakness: CWE-197
Which versions are affected by CVE-2026-102043?
How do I fix CVE-2026-102043?
No fix has been published for CVE-2026-102043 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-102043 being exploited?
There is no known exploitation of CVE-2026-102043 in the wild and no public exploit code.
Sources
Also known as GHSA-7wjv-h984-hxwr.