Threats Tagged 'cve-2026-21911'
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Threats Tagged 'cve-2026-21911'
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CVE-2026-21911 is an incorrect calculation vulnerability in the Layer 2 Control Protocol Daemon (l2cpd) of Juniper Networks Junos OS Evolved. It allows an unauthenticated network-adjacent attacker to flap the management interface, causing the system to stop learning new MAC addresses over label-switched interfaces and generating excessive logs that lead to high CPU usage. This results in a denial-of-service condition affecting network device availability. The vulnerability affects multiple versions of Junos OS Evolved prior to specific patched releases. Exploitation does not require authentication or user interaction but requires network adjacency. The CVSS score is 6.5 (medium severity) with impact primarily on availability. No known exploits are reported in the wild yet. Join the discussion | CVE Database V5 | 01/15/2026, 20:23:54 UTC Added: 01/15/2026, 20:30:47 UTC |
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