CVE-2015-5363: The SRX Network Security Daemon (nsd) in Juniper SRX Series services gateways with Junos 12.1X44 before 12....

Security readout for executives and security teams

A crafted DNS response can crash a Juniper SRX gateway process, causing denial of service. The sources describe an availability impact, not data theft or remote code execution. Risk is highest where affected SRX devices sit in critical network paths. Exposure is limited to Juniper SRX Series services gateways on the affected Junos release trains identified in the CVE description. The provided affected-product metadata is incomplete, so validate against device inventory and Juniper advisory details. Treat as a targeted availability risk for network security infrastructure. Patch affected SRX gateways during the next controlled maintenance window, faster for devices supporting critical connectivity or perimeter enforcement. Mitigation focus: Identify SRX gateways running affected Junos release trains.; Upgrade to the fixed Junos builds named in the CVE description.; Review Juniper advisory JSA10692 for current vendor guidance..

Prepared

Jun 13, 2026, 22:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.