Threats Tagged 'cve-2026-21921'
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Threats Tagged 'cve-2026-21921'
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CVE-2026-21921 is a Use After Free vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS and Junos OS Evolved. It allows a network-based attacker with low privileges to cause a denial-of-service (DoS) by triggering crashes in telemetry-capable processes through frequent subscription and unsubscription to sensors. Affected versions include all Junos OS and Junos OS Evolved releases prior to 22.4R3-S8, 23.2R2-S5, and 23.4R2. The vulnerability results in process crashes and restarts, potentially causing complete outages until recovery. The CVSS score is 6.5 (medium severity), reflecting no confidentiality or integrity impact but high availability impact. No known exploits are currently reported in the wild. Join the discussion | CVE Database V5 | 01/15/2026, 20:28:29 UTC Added: 01/15/2026, 20:45:44 UTC |
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