Threats Tagged 'cve-2026-21905'
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Threats Tagged 'cve-2026-21905'
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0 CVE-2026-21905 is a high-severity vulnerability in Juniper Networks Junos OS affecting SRX Series and MX Series devices with MX-SPC3 or MS-MPC service cards. It involves an infinite loop triggered by malformed SIP messages over TCP, causing the flow management process to crash and resulting in a denial of service (DoS). The vulnerability requires no authentication or user interaction and affects multiple Junos OS versions prior to specific patched releases. SIP messages over UDP are not affected. Exploitation leads to a crash of critical processes (flowd or mspmand), disrupting network traffic handling. No known exploits are currently reported in the wild. European organizations relying on Juniper SRX or MX Series devices for network security and routing are at risk of service disruption. Mitigation requires timely patching to the fixed Junos OS versions. Network-level filtering of SIP TCP traffic and monitoring for anomalous SIP message patterns can reduce exposure. Countries with high adoption of Juniper infrastructure and critical telecom or enterprise networks are most likely impacted. Join the discussion | CVE Database V5 | 01/15/2026, 20:19:22 UTC Added: 01/15/2026, 20:30:46 UTC |
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