CVE-2026-54363: Gladinet CentreStack

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

CentreStack before 17.5 contains a hardcoded cryptographic key vulnerability that allows unauthenticated attackers to forge arbitrary encrypted tokens by exploiting a static SysNumber value used as entropy for AccessTicket.Encrypt() and AccessTicket.Decrypt() across all installations. Attackers can use the hardcoded key to craft valid x-glad-auth headers and call privileged API endpoints such as acquiretenantbackuptoken to obtain a domain administrator IdentityTicket, enabling a complete unauthenticated remote code execution chain.

Affected products

• Gladinet CentreStack: before 17.5 (fixed in 17.5)

Published 2026-07-30. Last modified 2026-07-30.