CVE-2026-15105
davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead out-of-bounds write
LOW 2.1EPSS 0.4%
A flaw has been found in davenardella snap7 up to 1.4.3. This affects the function TS7Worker::PerformFunctionRead of the file src/core/s7_server.cpp of the component ReadVar Request Handler. This manipulation causes out-of-bounds write. The attack requires access to the local network. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
- Affected
- davenardella · snap7
- CVSS v4.0 VULDB
- 2.1 LOW
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 VULDB
- 6.3 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS v2.0 VULDB
- 5.8 MEDIUM
AV:A/AC:L/Au:N/C:P/I:P/A:P - EPSS
- 0.38% chance of exploitation in the next 30 days, 30th percentile
- Published
- 2026-07-08
- Updated
- 2026-08-01