CVE-2026-90572

MEDIUM 4.7

davenardella snap7 s7_micro_client.cpp opUpload memory corruption

CVSS Score

4.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-119
Vendor	davenardella
Product	snap7
Published	Sep 13, 2026
Last Updated	Sep 15, 2026

Stay Ahead of the Next One

Get instant alerts for davenardella snap7

Be the first to know when new medium vulnerabilities affecting davenardella snap7 are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

davenardella / snap7

1.4.0 1.4.1 1.4.2 1.4.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/403157 vuldb.com: https://vuldb.com/vuln/403157/cti vuldb.com: https://vuldb.com/cve/CVE-2026-90572 vuldb.com: https://vuldb.com/submit/912711 github.com: https://github.com/davenardella/snap7/issues/30 github.com: https://github.com/davenardella/snap7/

Credits

Mayur Agnihotri 🔍 mayur021 (VulDB User) mayur021 (VulDB User) VulDB CNA Team