CVE-2026-54366 CentreStack < 17.4 XXE via SharePoint Storage Configuration
Unauthenticated attackers can exfiltrate sensitive files via XXE in CentreStack's SharePoint storage configuration handler.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54366?
CVE-2026-54366 is a high-severity vulnerability in Gladinet CentreStack, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CentreStack before 17.4 contains an XML external entity (XXE) injection vulnerability that allows unauthenticated attackers to exfiltrate arbitrary files by supplying a malicious URL to the SharePoint storage configuration handler. Attackers can send a crafted request to the unauthenticated StorageConfig endpoint causing the server to fetch and parse attacker-controlled XML containing external DTD references, resulting in out-of-band file exfiltration of sensitive files such as Web.config, which may contain database credentials and cryptographic key material.
Weakness: CWE-611
Which versions are affected by CVE-2026-54366?
How do I fix CVE-2026-54366?
No fix has been published for CVE-2026-54366 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-54366 being exploited?
There is no known exploitation of CVE-2026-54366 in the wild and no public exploit code.
Sources
Also known as GHSA-m68w-g32j-mw5x.