CVE-2026-90572davenardella snap7 s7_micro_client.cpp opUpload memory corruption
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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.
- CVSS
- 4.7 MEDIUM (v3.1, CNA)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
- Weakness (CWE)
- CWE-119
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
davenardella snap7 davenardella:snap7 | 1.4.0; 1.4.1; 1.4.2; 1.4.3 | CNA record |
References
- https://vuldb.com/vuln/403157vdb-entry, technical-description, mitigation
- https://vuldb.com/vuln/403157/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-90572third-party-advisory
- https://vuldb.com/submit/912711third-party-advisory
- https://github.com/davenardella/snap7/issues/30exploit, issue-tracking
- https://github.com/davenardella/snap7/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.