CVE-2026-90572
davenardella snap7 s7_micro_client.cpp opUpload memory corruption
- State
- Published
- Severity
- 5.1 Medium
- Published
- Sep 13, 2026
- Updated
- Sep 15, 2026
- Reserved
- Sep 12, 2026
Description
A vulnerability was determined in davenardella snap7 up to 1.4.3. The affected element is the function TSnap7MicroClient::opUpload of the file src/core/s7_micro_client.cpp. Executing a manipulation of the argument DataLen can lead to memory corruption. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 4.7 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 4.7 Medium | CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 5.8 Medium | AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
- CWE-119 Memory Corruption
Affected Products
| Product | Versions |
|---|---|
snap7davenardella |
|
References
- VDB-403157 | davenardella snap7 s7_micro_client.cpp opUpload memory corruptionvdb-entrytechnical-descriptionmitigation
- VDB-403157 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-90572 | CVE Analysis and Reportthird-party-advisory
- Submit #912711 | davenardella snap7 1.4.3 Memory Corruptionthird-party-advisory
- https://github.com/davenardella/snap7/issues/30exploitissue-tracking
- https://github.com/davenardella/snap7/product
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