Threats Tagged 'cve-2026-21912'
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Threats Tagged 'cve-2026-21912'
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0 CVE-2026-21912 is a medium severity TOCTOU race condition vulnerability in Juniper Networks Junos OS affecting MX10k Series with LC480 or LC2101 line cards. A local, low-privileged attacker can repeatedly execute the 'show system firmware' CLI command to cause the affected line cards to crash and restart, potentially leading to chassisd process crashes and core dumps. This vulnerability impacts multiple Junos OS versions prior to specific patch releases. Exploitation does not require user interaction but requires local access with low privileges. The vulnerability results in availability disruption without compromising confidentiality or integrity. No known exploits are currently in the wild. European organizations using MX10k Series routers with these line cards should prioritize patching to prevent potential denial-of-service conditions. Countries with significant Juniper infrastructure deployments and critical network backbones are at higher risk. Mitigation involves applying vendor patches once available and restricting local CLI access to trusted administrators only. Join the discussion | CVE Database V5 | 01/15/2026, 20:24:20 UTC Added: 01/15/2026, 20:30:47 UTC |
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