CVE-2026-71265

HIGH 7.5

Domoticz MochadTCP Stack Buffer Overflow via MOCHAD_RFSEC strcpy()

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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). An attacker on the local network segment able to reach the Mochad TCP bridge (default port 1099, no authentication) can send a crafted packet that overflows tempRFSECbuf by up to several hundred bytes, corrupting the Domoticz worker thread's stack.

CWE	CWE-121
Vendor	domoticz
Product	domoticz
Published	Aug 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

domoticz / domoticz

0 ≤ *

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/domoticz/domoticz github.com: https://github.com/domoticz/domoticz/blob/master/hardware/MochadTCP.cpp

Credits

Alibek Baxtiyorov