CVE-2026-102066 Junos OS and Junos OS Evolved: Malformed RSVP packet causes a rpd crash when RSVP is enabled
An adjacent attacker can crash the routing daemon by sending a malformed RSVP packet, requiring RSVP to be enabled on the interface.
- 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-2026-102066?
CVE-2026-102066 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 Improper Validation of Specified Quantity in Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a denial of service via a malformed RSVP packet when RSVP is enabled on the receiving interface.
Weakness: CWE-1284
Which versions are affected by CVE-2026-102066?
How do I fix CVE-2026-102066?
No fix has been published for CVE-2026-102066 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-2026-102066 being exploited?
There is no known exploitation of CVE-2026-102066 in the wild and no public exploit code.
Sources
Also known as GHSA-q4mr-jjqg-mgv2.