Quick answers
- Is CVE-2026-102066 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-102066 being exploited in the wild.
- How severe is CVE-2026-102066?
- Medium severity, with a CVSS score of 6.5, published 14 October 2026.
- Which products and versions are affected?
- Juniper Networks Junos OS; Juniper Networks Junos OS Evolved.
- Is there a fix for CVE-2026-102066?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-102066 attacked?
- It is attacked from the adjacent network, in an operating system.
- Am I affected by CVE-2026-102066?
- Check whether you run Juniper Networks Junos OS or Juniper Networks Junos OS Evolved. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The routing protocol daemon (rpd) in Junos OS and Junos OS Evolved improperly validates the quantity of input in RSVP packets, allowing an adjacent unauthenticated attacker to trigger a denial of service. The vulnerability is triggered by sending a specially crafted RSVP packet to an interface with RSVP enabled, causing the routing daemon to crash.
Affected products
- Juniper Networks Junos OS
- Juniper Networks Junos OS Evolved
Timeline
- 2026-10-14: disclosed