CVE-2025-11778 Stack-based buffer overflow vulnreability in Circutor SGE-PLC1000/SGE-PLC50

Critical 10.0 Published 2 Dec 2025 Updated 2 Dec 2025

Remote attackers can exploit a stack-based buffer overflow in Circutor PLCs via TACACSPLUS to execute arbitrary code or cause denial of service.

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-2025-11778?

CVE-2025-11778 is a critical memory corruption vulnerability in SGE-PLC1000 SGE-PLC50 Circutor, published on 2 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Stack-based buffer overflow in Circutor SGE-PLC1000/SGE-PLC50 v0.9.2. This vulnerability allows an attacker to remotely exploit memory corruption through the 'read_packet()' function of the TACACSPLUS implementation.

Weakness: CWE-122

Which versions are affected by CVE-2025-11778?

It affects 2 products.

Products include Circutor Sge-Plc1000 Firmware, Circutor Sge-Plc50 Firmware.

How do I fix CVE-2025-11778?

No fix has been published for CVE-2025-11778 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-2025-11778 being exploited?

There is no known exploitation of CVE-2025-11778 in the wild and no public exploit code.

Sources

Also known as GHSA-85hg-ff73-jfw9.