CVE-2026-54363

CRITICAL 9.1

CentreStack < 17.5 Hardcoded Key Token Forgery RCE

CVSS Score

9.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-321
Vendor	gladinet
Product	centrestack
Published	Jul 30, 2026
Last Updated	Jul 30, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Gladinet / CentreStack

0 < 17.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

centrestack.com: https://www.centrestack.com/ vulncheck.com: https://www.vulncheck.com/advisories/centrestack-hardcoded-key-token-forgery-rce

Credits

PeterV @cfc security ltd