CVE-2026-16225
davenardella snap7 s7_peer.cpp NegotiatePDULength out-of-bounds write
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.
INFO
Published Date :
July 19, 2026, 9:17 a.m.
Last Modified :
July 19, 2026, 9:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update snap7 to version 1.4.4 or later.
- Apply vendor patches if available.
- Recompile the affected application.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-16225.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-16225 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-16225
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-16225 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-16225 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:davenardella:snap7:*:*:*:*:*:*:*:*'], 'vendor': 'davenardella', 'product': 'snap7', 'versions': [{'status': 'affected', 'version': '1.4.0'}, {'status': 'affected', 'version': '1.4.1'}, {'status': 'affected', 'version': '1.4.2'}, {'status': 'affected', 'version': '1.4.3'}]}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Added CVSS V2 (AV:N/AC:L/Au:S/C:P/I:P/A:P) Added CWE CWE-119 Added CWE CWE-787 Added Reference https://github.com/davenardella/snap7/ Added Reference https://github.com/davenardella/snap7/issues/17 Added Reference https://vuldb.com/cve/CVE-2026-16225 Added Reference https://vuldb.com/submit/858228 Added Reference https://vuldb.com/vuln/380047 Added Reference https://vuldb.com/vuln/380047/cti