Quick answers
- Is CVE-2026-101952 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-101952 being exploited in the wild.
- How severe is CVE-2026-101952?
- High severity, with a CVSS score of 7.5, 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-2026-101952?
- 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-2026-101952 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-101952?
- 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 lacks proper validation of ISO-VPN BGP updates, allowing a configured BGP peer to trigger a crash by sending a malformed ISO-VPN update. The vulnerability is exposed when BMP route monitoring or NSR (Non-Stop Routing) processes the update. Authentication as a configured peer is required; no user interaction is needed.
Affected products
- Juniper Networks Junos OS
- Juniper Networks Junos OS Evolved
Timeline
- 2026-10-14: disclosed