CVE-2025-41766 Stack buffer overflow on parsing web request
A remote attacker can achieve full device compromise via a stack buffer overflow in the web request parser.
- 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-2025-41766?
CVE-2025-41766 is a high-severity memory corruption vulnerability in MBS UBR-01 Mk II, published on 9 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A low-privileged remote attacker can trigger a stack-based buffer overflow via a crafted HTTP POST request using the ubr-network method resulting in full device compromise.
Weakness: CWE-787
Which versions are affected by CVE-2025-41766?
It affects 1 product.
Products include Mbs-Solutions Universal Bacnet Router Firmware.
How do I fix CVE-2025-41766?
No fix has been published for CVE-2025-41766 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-41766 being exploited?
There is no known exploitation of CVE-2025-41766 in the wild and no public exploit code.
Other vulnerabilities in MBS UBR-01 Mk II
Sources
Also known as GHSA-fp48-r694-65jv.