Live › vulnerability › CVE-2026-93857
Go to dashboardA stack-based buffer overflow in the SIP proxy of Fireware OS, the firmware for WatchGuard firewalls, can be triggered by a specially crafted request sent through a policy that uses the SIP proxy. A remote, unauthenticated attacker can execute arbitrary code on the appliance.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-27 16:33 UTC. All times on this page are UTC.
Organizations running WatchGuard Fireware OS firewalls with a policy that routes SIP traffic through the SIP proxy are exposed. Sites that do not use the SIP proxy in any policy, or that run a patched release, can skip it. The sources do not give the affected version range.
No product ranges from the sources yet.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
A stack-based buffer overflow vulnerability in Fireware OS's SIP proxy allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted request through a policy that uses the SIP proxy.
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