Threats Tagged 'cve-2026-21906'
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Threats Tagged 'cve-2026-21906'
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0 CVE-2026-21906 is a high-severity vulnerability in Juniper Networks Junos OS running on SRX Series devices. It involves improper handling of exceptional conditions in the packet forwarding engine (PFE) when processing a specific ICMP packet sent through a GRE tunnel with PowerMode IPsec (PMI) and GRE performance acceleration enabled. An unauthenticated attacker can exploit this remotely to cause the PFE to crash and restart, resulting in traffic loss and potential denial of service. PMI is enabled by default, and GRE performance acceleration is configurable on certain SRX platforms, increasing exposure. The vulnerability affects multiple Junos OS versions prior to specific patched releases. Although no exploits are currently known in the wild, the ease of network-based exploitation without authentication makes this a significant risk for organizations using affected SRX devices. Immediate patching and configuration review are recommended to mitigate impact. Join the discussion | CVE Database V5 | 01/15/2026, 20:20:32 UTC Added: 01/15/2026, 20:30:46 UTC |
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