CVE-2026-16225
davenardella snap7 s7_peer.cpp NegotiatePDULength out-of-bounds write
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 19, 2026
- Updated
- Jul 20, 2026
- Reserved
- Jul 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | 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 | VulDB |
| 3.1 | 6.3 Medium | 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 | VulDB |
| 3.0 | 6.3 Medium | 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 | VulDB |
| 2.0 | 6.5 Medium | AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
snap7davenardella |
|
References
- VDB-380047 | davenardella snap7 s7_peer.cpp NegotiatePDULength out-of-bounds writevdb-entrytechnical-description
- VDB-380047 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-16225 | CVE Analysis and Reportthird-party-advisory
- Submit #858228 | Davide Nardella Snap7 1.4.3 Heap-Based Intra-Object Out-of-Bounds Writethird-party-advisory
- https://github.com/davenardella/snap7/issues/17exploitissue-tracking
- https://github.com/davenardella/snap7/product
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