CVE-2026-15105

MEDIUM

davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead deserialization

Title source: cna
STIX 2.1

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 deserialization. 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.

References (7)

Core 7
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-376946 | davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead deserialization
https://vuldb.com/vuln/376946
Signature, Permissions Required signature permissions-required
VDB-376946 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/376946/cti
Third Party Advisory third-party-advisory
CVE-2026-15105 | CVE Analysis and Report
https://vuldb.com/cve/CVE-2026-15105
Third Party Advisory third-party-advisory
Submit #851026 | Davide Nardella Snap7 master(commit:30f37da3114024a71ba93f7fd855c680b97a406f) Stack-based Buffer Overflow
https://vuldb.com/submit/851026
Issue Tracking issue-tracking
https://github.com/davenardella/snap7/issues/16

Scores

CVSS v3 6.3
EPSS 0.0029
EPSS Percentile 20.8%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-20 CWE-502
Status published
Products (4)
davenardella/snap7 1.4.0
davenardella/snap7 1.4.1
davenardella/snap7 1.4.2
davenardella/snap7 1.4.3
Published Jul 08, 2026
Tracked Since Jul 09, 2026