Memory Corruption Vulnerability in davenardella Snap7 Client
CVE-2026-90572

5.1MEDIUM

Key Information:

Vendor

Davenardella

Status
Snap7
Vendor
CVE Published:
13 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90572?

A memory corruption vulnerability exists in the davenardella Snap7 client, specifically within the TSnap7MicroClient::opUpload function. This flaw allows an attacker to manipulate the DataLen argument, potentially leading to unauthorized actions and memory corruption. The exploit can be executed remotely, making it critical for users to assess their exposure. Despite the project team being notified of this issue through an issue report, no response has been documented. This vulnerability has been publicly disclosed, raising awareness among the security community and users of the affected product.

Affected Version(s)

snap7 1.4.0

snap7 1.4.1

snap7 1.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-90572 - Proof of Concept

References

https://vuldb.com/vuln/403157
vdb-entrytechnical-descriptionmitigation
https://vuldb.com/vuln/403157/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90572
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

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