CVE-2026-101949 Null dereference in Junos OS
An unauthenticated remote BGP neighbor can cause a denial of service in Junos OS by sending a specific BGP update when BMP monitoring is configured.
- 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-2026-101949?
CVE-2026-101949 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 routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated remote BGP neighbor to cause a denial of service via a VPN-flowspec BGP update if it is readvertised and BMP post-policy RIB-out monitoring is configured.
Weakness: CWE-476
Which versions are affected by CVE-2026-101949?
How do I fix CVE-2026-101949?
No fix has been published for CVE-2026-101949 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101949 being exploited?
There is no known exploitation of CVE-2026-101949 in the wild and no public exploit code.
Sources
Also known as GHSA-7544-9987-w8rg.