CVE-2026-16225

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.

CVSS 4.0

2.1CVSS: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

CVSS 3.1

6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-787

Published

2026-07-19

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

References

• https://github.com/davenardella/snap7/
• https://github.com/davenardella/snap7/issues/17
• https://vuldb.com/cve/CVE-2026-16225
• https://vuldb.com/submit/858228
• https://vuldb.com/vuln/380047

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