CVE-2023-3634 Festo: MSE6-C2M/D2M/E2M Incomplete User Documentation of Remote Accessible Functions
Authenticated low-privileged attackers can access undocumented test mode functions, causing complete loss of confidentiality, integrity, and availability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-3634?
CVE-2023-3634 is a high-severity missing authorization vulnerability in Festo MSE6-C2M-5000-FB36-D-M-RG-BAR-M12L4-AGD, published on 16 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In products of the MSE6 product-family by Festo a remote authenticated, low privileged attacker could use functions of undocumented test mode which could lead to a complete loss of confidentiality, integrity and availability.
Weakness: CWE-1242
Which versions are affected by CVE-2023-3634?
How do I fix CVE-2023-3634?
No fix has been published for CVE-2023-3634 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-2023-3634 being exploited?
There is no known exploitation of CVE-2023-3634 in the wild and no public exploit code.
Sources
Also known as GHSA-gp63-xp8x-53g4.