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CVE-2026-90572— davenardella snap7 s7_micro_client.cpp opUpload memory corruption

Quick assessment

Affected
davenardella snap7
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 davenardella snap7 1.4.3 及更早版本中发现了一个漏洞。受影响的组件是文件 中的函数 。对参数 进行恶意操控可能导致内存损坏。该攻击可远程执行。此漏洞的利用方法已被公开披露，可能被利用。项目方已通过问题报告提前得知该问题，但尚未作出回应。

CVSS 4.7 · Medium
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I. Basic Information for CVE-2026-90572

Vulnerability Information
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Vulnerability Title
davenardella snap7 s7_micro_client.cpp opUpload memory corruption
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
davenardella snap7 1.4.0 cpe:2.3:a:davenardella:snap7:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-90572

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III. Intelligence Information for CVE-2026-90572

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Patches & Fixes for CVE-2026-90572 (1)

Other References for CVE-2026-90572 (1)

IV. Related Vulnerabilities

Same product: snap7
Same vendor: davenardella
Same weakness: CWE-119

V. Comments for CVE-2026-90572

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