CVE-2026-101962

7.5High

Published 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash

7.5High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: High impact on availability
Weakness: CWE-130

Impact

Remote, unauthenticated BGP peers can crash the routing protocol daemon (rpd), causing a denial of service across the device. They need an established BGP session capable of sending EVPN multicast updates that get readvertised.

Root cause

The routing protocol daemon mishandles inconsistent length parameters when attempting to readvertise a malformed BGP EVPN multicast update.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fix & remediation

Upgrade to the patched Junos OS / Junos OS Evolved release referenced in JSA112187. If you cannot patch immediately, filter or restrict untrusted BGP EVPN peer sessions that could inject malformed multicast routes.

shell

$ show version

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker sending a specifically malformed BGP EVPN multicast update which is attempted to be readvertised to cause an rpd crash.

References

https://supportportal.juniper.net/JSA112187

Source: nvd.nist.gov/vuln/detail/CVE-2026-101962