# CVE-2026-54363: Gladinet CentreStack hardcoded cryptographic key in AccessTicket

Source: https://junglewise.ai/threats/cve-2026-54363-gladinet-centrestack-hardcoded-cryptographic-key-in-accessticket  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-30. Updated: 2026-07-30  
License: CC BY 4.0 with a link back

CVE-2026-54363 · Severity: critical · CVSS 9.1 · Published 2026-07-30

CentreStack, a file-sharing and remote access platform used by managed service providers, contains a security flaw where a secret key used to protect user sessions is the same across all installations. An unauthorized attacker can use this knowledge to create their own administrative credentials, granting them full control over the system. This could lead to the theft of sensitive client data, complete service disruption, and the ability to execute malicious commands on the server.

Technologies: [Gladinet CentreStack](https://junglewise.ai/threats/technologies/centrestack). Vendors: [Gladinet](https://junglewise.ai/threats/vendors/gladinet).

## Quick answers

**Is CVE-2026-54363 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54363 being exploited in the wild.

**How severe is CVE-2026-54363?** Critical severity, with a CVSS score of 9.1, published 30 July 2026.

**Which products and versions are affected?** Gladinet CentreStack before 17.5.

**Is there a fix for CVE-2026-54363?** A patch was published on 2026-07-30: Fixed in version 17.5 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54363 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-54363?** Check whether you run Gladinet CentreStack at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

CentreStack versions prior to 17.5 utilize a hardcoded cryptographic key derived from a static 'SysNumber' value used as entropy for the AccessTicket.Encrypt() and AccessTicket.Decrypt() functions. Because this value is identical across all installations, an unauthenticated remote attacker can forge valid 'x-glad-auth' headers. By leveraging these forged headers, an attacker can access privileged API endpoints, such as 'acquiretenantbackuptoken', to obtain a domain administrator IdentityTicket. This sequence allows for a complete authentication bypass and subsequent remote code execution (RCE) on the affected server. The vulnerability is classified as CWE-321 (Use of Hard-coded Cryptographic Key).

## Affected products

- Gladinet CentreStack before 17.5

## Timeline

- 2026-07-30: advisory: Vulnerability disclosed by VulnCheck and NVD
- 2026-07-30: patched: Fixed in version 17.5

## References

- [https://www.centrestack.com/](https://www.centrestack.com/)
- [https://www.vulncheck.com/advisories/centrestack-hardcoded-key-token-forgery-rce](https://www.vulncheck.com/advisories/centrestack-hardcoded-key-token-forgery-rce)

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