CVE-2026-101940 Junos OS and Junos OS Evolved: An attacker causes a routing-daemon crash when BGP ISO-VPN egress protection is enabled
An unauthenticated BGP peer can crash the routing daemon via a crafted UPDATE when ISO-VPN egress protection is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101940?
CVE-2026-101940 is a high-severity vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A NULL Pointer Dereference vulnerability in the rpd routing daemon of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated configured BGP peer to cause a denial of service via a BGP UPDATE when ISO-VPN and egress-protection configuration is enabled.
Weakness: CWE-476
Which versions are affected by CVE-2026-101940?
How do I fix CVE-2026-101940?
No fix has been published for CVE-2026-101940 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101940 being exploited?
There is no known exploitation of CVE-2026-101940 in the wild and no public exploit code.
Sources
Also known as GHSA-mm2r-8hqh-vh2p.