# CVE-2026-54364: Gladinet CentreStack session variable injection in SelectProvider.aspx

Source: https://junglewise.ai/threats/cve-2026-54364-gladinet-centrestack-session-variable-injection-in-selectprovider  
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-2026-54364 · Severity: medium · CVSS 6.5 · Published 2026-07-30

CentreStack is a file-sharing and management platform used by IT service providers to give clients remote access to data. A security flaw allows unauthorized individuals to manipulate their session data by sending specially crafted web requests. This could allow an attacker to bypass security checks and gain access to administrative management pages, potentially compromising client data or system settings.

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

## Quick answers

**Is CVE-2026-54364 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54364 being exploited in the wild.

**How severe is CVE-2026-54364?** Medium severity, with a CVSS score of 6.5, published 30 July 2026.

**Which products and versions are affected?** Gladinet CentreStack before 17.4.

**Is there a fix for CVE-2026-54364?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-54364 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-54364?** 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

A session variable injection vulnerability exists in CentreStack versions prior to 17.4 due to improper input sanitization in the custom session serialization format. An unauthenticated attacker can inject arbitrary session variables by embedding newline and tab characters into the 'AccountName' parameter sent to the 'SelectProvider.aspx' endpoint. By injecting a 'resellerid' session variable, an attacker can bypass the 'IsValidRSession' authentication check. This allows unauthorized access to management pages and potentially other restricted administrative functions. The issue is addressed in version 17.4.

## Affected products

- Gladinet CentreStack before 17.4

## Timeline

- 2026-07-30: advisory: Advisory published by VulnCheck and NVD

## References

- [https://www.centrestack.com/](https://www.centrestack.com/)
- [https://www.vulncheck.com/advisories/centrestack-session-injection-via-selectprovider-aspx](https://www.vulncheck.com/advisories/centrestack-session-injection-via-selectprovider-aspx)

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