CVE-2026-102022: Juniper Junos OS reachable assertion in BGP-LS routing daemon

CVE-2026-102022 · Severity: high · CVSS 7.5 · Published 2026-10-14

Juniper Junos OS and Junos OS Evolved are routing operating systems used in network infrastructure devices. A flaw in the routing protocol daemon allows an attacker with access to a configured BGP-LS peer to crash the routing process by sending specially crafted BGP-LS Link NLRI advertisements, causing network outages.

Technologies: Juniper Networks Junos OS, Juniper Networks Junos OS Evolved. Vendors: Juniper Networks.

Quick answers

Is CVE-2026-102022 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-102022 being exploited in the wild.
How severe is CVE-2026-102022?
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-2026-102022?
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-2026-102022 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-102022?
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

A reachable assertion vulnerability exists in the routing protocol daemon (rpd) when processing BGP-LS (BGP Link State) NLRI advertisements. An attacker with network access to a configured BGP-LS peer can trigger the assertion by sending a crafted BGP-LS Link NLRI, causing an rpd crash and routing service disruption. The vulnerability requires BGP-LS to be configured and an established peer relationship.

Affected products

  • Juniper Networks Junos OS
  • Juniper Networks Junos OS Evolved

Timeline

  • 2026-10-14: disclosed

References

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