CVE-2026-16225 | A security flaw has been discovered in davenardella snap7 up… | CVSS 6.3 MEDIUM

Description

A security flaw has been discovered in davenardella snap7 up to 1.4.3. The impacted element is the function TSnap7Peer::NegotiatePDULength of the file src/core/s7_peer.cpp. The manipulation of the argument PDULength results in out-of-bounds write. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

Metadata

CVE ID: CVE-2026-16225
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-07-18 12:29 UTC
Published: 2026-07-19 08:00 UTC
Last updated: 2026-07-19 08:00 UTC
Primary CWE: CWE-787
Out-of-bounds Write
Vendor / Product: davenardella / snap7
Sources: cve.org · NVD

Severity & Metrics

6.3 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

Affected products (1)

Vendor	Product	Platform	Versions
davenardella	snap7	—	1.4.0, 1.4.1, 1.4.2, 1.4.3

Weakness (CWE)

CWE	Source	Description
CWE-119	cna	Memory Corruption
CWE-787	cna	Out-of-bounds Write

CVSS scores (4)

Score	Severity	Version	Source	Vector
6.5	N/D	2.0	cna	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
6.3	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
6.3	MEDIUM	3.0	cna	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
5.3	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

References (6)

VDB-380047 | davenardella snap7 s7_peer.cpp NegotiatePDULength out-of-bounds write https://vuldb.com/vuln/380047
VDB-380047 | CTI Indicators (IOB, IOC, IOA) https://vuldb.com/vuln/380047/cti
CVE-2026-16225 | CVE Analysis and Report https://vuldb.com/cve/CVE-2026-16225
Submit #858228 | Davide Nardella Snap7 1.4.3 Heap-Based Intra-Object Out-of-Bounds Write https://vuldb.com/submit/858228
https://github.com/davenardella/snap7/issues/17
https://github.com/davenardella/snap7/