CVE-2026-101993 Denial of service in Junos OS
An adjacent eBGP peer can crash the routing daemon via VPLS signaling when automatic site-ID negotiation is enabled.
- 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-2026-101993?
CVE-2026-101993 is a high-severity denial of service 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 Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent eBGP peer to cause a denial of service via a VPLS signaling update when automatic site-ID negotiation is enabled.
Weakness: CWE-617
Which versions are affected by CVE-2026-101993?
How do I fix CVE-2026-101993?
No fix has been published for CVE-2026-101993 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-2026-101993 being exploited?
There is no known exploitation of CVE-2026-101993 in the wild and no public exploit code.
Sources
Also known as GHSA-7f8h-597j-f5xc.