CVE-2026-82785 Memory corruption in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*
A remote attacker can cause a denial-of-service condition in Contec Remote I/O Coupler Units by sending a specially crafted request that triggers a stack-based buffer overflow.
- 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-2026-82785?
CVE-2026-82785 is a medium-severity memory corruption vulnerability in Contec Co., Ltd. Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Stack-based buffer overflow vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*. Receiving a specially crafted request created and sent by a remote attacker may cause a denial-of-service (DoS) condition.
Weakness: CWE-121
Which versions are affected by CVE-2026-82785?
How do I fix CVE-2026-82785?
No fix has been published for CVE-2026-82785 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-2026-82785 being exploited?
There is no known exploitation of CVE-2026-82785 in the wild and no public exploit code.
Sources
Also known as GHSA-vvvm-mx34-h72c.