CVE-2026-101943 Junos OS and Junos OS Evolved: An attacker causes rpd crash and denial of service when EVPN is configured
An unauthenticated attacker can crash the routing daemon and cause denial of service by sending crafted BGP EVPN messages when EVPN 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-2026-101943?
CVE-2026-101943 is a high-severity denial of service 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
An Improper Input Validation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker to cause a denial of service via a crafted BGP EVPN update message.
Weakness: CWE-20
Which versions are affected by CVE-2026-101943?
How do I fix CVE-2026-101943?
No fix has been published for CVE-2026-101943 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-101943 being exploited?
There is no known exploitation of CVE-2026-101943 in the wild and no public exploit code.
Sources
Also known as GHSA-jcrw-8x22-r4cx.