CVE-2026-102021 Junos OS and Junos OS Evolved: Malformed RSVP packet causes rpd crash when MPLS-TE error processing is enabled
An adjacent attacker can crash the routing daemon via a crafted RSVP packet when MPLS-TE error processing is enabled, causing denial of service.
- 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-2026-102021?
CVE-2026-102021 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 NULL Pointer Dereference vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent network attacker to cause a denial of service via a crafted RSVP packet when MPLS-TE RSVP processing is enabled. The condition can terminate rpd and disrupt routing protocol sessions.
Weakness: CWE-476
Which versions are affected by CVE-2026-102021?
How do I fix CVE-2026-102021?
No fix has been published for CVE-2026-102021 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-102021 being exploited?
There is no known exploitation of CVE-2026-102021 in the wild and no public exploit code.
Sources
Also known as GHSA-w7mj-v6m2-38qq.