Domoticz MochadTCP Stack Buffer Overflow via MOCHAD_RFSEC strcpy()

published 2026-08-05 3 mo ago modified 2026-08-26 2 mo ago also EUVD-2026-53350

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

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).

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-71265 updated 2026-10-31 cvss 7.5

Domoticz: Domoticz: Stack Buffer Overflow via MochadTCP MOCHAD_RFSEC message processing

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 3 mo ago (2026-08-05)

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

domoticz domoticz

Classification

Weakness

CWE-121 Stack-based Buffer Overflow

References

github.com /domoticz/domoticz
third-party-advisory
github.com /domoticz/domoticz/blob/master/hardware/MochadTCP.cpp
third-party-advisory

Sources

CVE List CVE-2026-71265
NVD CVE-2026-71265

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary