CVE-2026-55400: Absolute Secure Access

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

CVE-2026-55400 is an integer underflow in Secure Access servers prior to version 14.57. Attackers with an authenticated session can send specially crafted traffic to a server in a non-default configuration and cause a persistent denial of service.

Affected products

• Absolute Secure Access: before 14.57 (fixed in 14.57)

Published 2026-08-13. Last modified 2026-09-04.