Buffer overflow in Davenardella Snap7
CVE-2026-90572
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.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Davenardella Snap7 — versions 1.4.0, 1.4.1, 1.4.2
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry, mitigation)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (issue-tracking, exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-90572?
- CVE-2026-90572 is a medium-severity vulnerability in Davenardella Snap7, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.7/10. Published 2026-09-13.
- How severe is CVE-2026-90572?
- Medium severity. CVSS v3 base score is 4.7 out of 10.