CVE-2026-57910: WatchGuard Agent

Critical severity, CVSS 9.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper authentication in the WatchGuard Agent allows an unauthenticated attacker with network access to cause the agent to execute arbitrary code with elevated privileges.

Affected products

• WatchGuard WatchGuard Agent: before 1.17.01.0000 (fixed in 1.17.01.0000); before 1.25.13.0000 (fixed in 1.25.13.0000); before 1.17.21.0000 (fixed in 1.17.21.0000)

Published 2026-08-25. Last modified 2026-09-28.