Medium severity · published Jul 19, 2026
CVE-2026-16225
davenardella snap7 s7_peer.cpp NegotiatePDULength out-of-bounds write
6.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SN
snap7 · davenardella
1.4.0; 1.4.1; 1.4.2; 1.4.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16225
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-16225
github.com
https://github.com/davenardella/snap7/
github.com
https://github.com/davenardella/snap7/issues/17
vuldb.com
https://vuldb.com/cve/CVE-2026-16225
vuldb.com
https://vuldb.com/submit/858228
vuldb.com
https://vuldb.com/vuln/380047
vuldb.com
https://vuldb.com/vuln/380047/cti
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