CVE-2026-15105
CVE-2026-15105 · davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead out-of-bounds write
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.3 · Medium · EPSS 0.4%
- Published
- Updated
Stack: system
Affected products and versions
snap7
- Versions
- 1.4.0: Affected
- 1.4.1: Affected
- 1.4.2: Affected
- 1.4.3: Affected
No fix published
snap7 Ubuntu:25.10
- Versions
- 1.4.2+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snap7 Ubuntu:26.10
- Versions
- 1.4.2+dfsg-1build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
snap7 Ubuntu:26.04:LTS
- Versions
- 1.4.2+dfsg-1
- 1.4.2+dfsg-1build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://vuldb.com/vuln/376946
- https://vuldb.com/vuln/376946/cti
- https://vuldb.com/cve/CVE-2026-15105
- https://vuldb.com/submit/851026
- https://github.com/davenardella/snap7/issues/16
- https://github.com/user-attachments/files/28681740/poc.zip
- https://github.com/davenardella/snap7/
- https://nvd.nist.gov/vuln/detail/CVE-2026-15105