Vulnerability Description
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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/davenardella/snap7/
- https://github.com/davenardella/snap7/issues/16
- https://github.com/user-attachments/files/28681740/poc.zip
- https://vuldb.com/cve/CVE-2026-15105
- https://vuldb.com/submit/851026
- https://vuldb.com/vuln/376946
- https://vuldb.com/vuln/376946/cti
FAQ
What is CVE-2026-15105?
CVE-2026-15105 is a vulnerability with a CVSS score of 6.3 (MEDIUM). 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 mani...
How severe is CVE-2026-15105?
CVE-2026-15105 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-15105?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.