CVE-2026-10521 Authenticated unintended access to critical program parameters
High-privileged attackers can access hidden configuration methods to modify critical parameters, causing total loss of confidentiality, integrity, and availability.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10521?
CVE-2026-10521 is a high-severity missing authorization vulnerability in mbCONNECT24, published on 23 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An high privileged remote attacker can access a hidden configuration method, that should not be accessible by any user, to modify critical program parameters. This can result in a total loss of confidentiality, integrity and availability.
Weakness: CWE-425
Which versions are affected by CVE-2026-10521?
How do I fix CVE-2026-10521?
No fix has been published for CVE-2026-10521 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-10521 being exploited?
There is no known exploitation of CVE-2026-10521 in the wild and no public exploit code.
Sources
Also known as GHSA-vwqx-9g89-x938.