CVE-2026-54363

Critical

Description

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.

SeverityCritical

CVSS9.1

Exploit probability—

ProductCentreStack

PublishedJul 30, 2026

First seenJul 30, 2026

Weakness typeCWE-321CWE-321

How to fix

Update

Gladinet CentreStack17.5 or later

Affected products

Product	Affected versions	Fixed in
Gladinet CentreStack	v < 17.5	17.5

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