Deserialization Vulnerability in davenardella Snap7 Product
CVE-2026-15105

5.3MEDIUM

Key Information:

Vendor

Davenardella

Status
Snap7
Vendor
CVE Published:
8 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-15105?

A deserialization flaw exists in davenardella's Snap7 product, impacting the TS7Worker::PerformFunctionRead function within the ReadVar Request Handler component. This vulnerability allows for manipulation of data structures, which can lead to remote exploitation on local networks. The problem has been reported to the developers, but no corrective action has been communicated. Exploits leveraging this vulnerability have been published, stressing the need for urgent review and remediation by users and administrators of affected versions.

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-2026-15105 - Proof of Concept

References

https://vuldb.com/vuln/376946
vdb-entrytechnical-description
https://vuldb.com/vuln/376946/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-15105
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Adjacent 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

VULL (VulDB User)
VulDB CNA Team
.