CVE-2026-15105CWE-119CWE-787

CVE-2026-15105

Medium · published July 9, 2026

CVSS v3.1
6.3
EPSS
0%
Percentile
30.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00377 · 30.5th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-787 · Out-of-bounds Write
Published
2026-07-09T03:16Z
References (7)
https://github.com/davenardella/snap7/ · [email protected]https://github.com/davenardella/snap7/issues/16 · [email protected]https://github.com/user-attachments/files/28681740/poc.zip · [email protected]https://vuldb.com/cve/CVE-2026-15105 · [email protected]https://vuldb.com/submit/851026 · [email protected]https://vuldb.com/vuln/376946 · [email protected]https://vuldb.com/vuln/376946/cti · [email protected]
EPSS history
Timeline
  • 08 JUL 22:15Z
    davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead deserialization
    cvelistv5