CVE-2026-71265 Domoticz MochadTCP Stack Buffer Overflow via MOCHAD_RFSEC strcpy()
Attacker can trigger stack buffer overflow in Domoticz via crafted MOCHAD_RFSEC messages, potentially leading to code execution or service crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71265?
CVE-2026-71265 is a high-severity memory corruption vulnerability in domoticz, published on 5 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Domoticz's MochadTCP::MatchLine handler for MOCHAD_RFSEC messages (hardware/MochadTCP.cpp) copies network-received data from the up-to-1028-byte m_mochadbuffer into a fixed 50-byte stack buffer tempRFSECbuf using strcpy with no length check, across three separate code branches (DS10A/KR10A/MS10A device types).
Weakness: CWE-121
Which versions are affected by CVE-2026-71265?
How do I fix CVE-2026-71265?
No fix has been published for CVE-2026-71265 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-2026-71265 being exploited?
There is no known exploitation of CVE-2026-71265 in the wild and no public exploit code.
Sources
Also known as GHSA-fgwp-vhm9-7g5q.