Heap-Based Buffer Overflow in gmg137 Snap7-RS Client
CVE-2025-15247

6.9MEDIUM

Key Information:

Vendor

Gmg137

Status
Snap7-rs
Vendor
CVE Published:
30 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15247?

A vulnerability in gmg137's snap7-rs has been identified within the function snap7_rs::client::S7Client::download located in client.rs. This flaw can lead to a heap-based buffer overflow, allowing attackers to execute arbitrary code remotely. Given that the exploit is publicly available, the risk factor remains significant. The product follows a rolling release model, making it challenging to determine specific versioning for affected or patched releases. Despite early notification of the issue through an issue report, no response has been forthcoming from the developers.

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Affected Version(s)

snap7-rs 153d3e8c16decd7271e2a5b2e3da4d6f68589424

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-2025-15247 - Proof of Concept

References

https://vuldb.com/?id.338637
vdb-entrytechnical-description
https://vuldb.com/?ctiid.338637
signaturepermissions-required
https://gitee.com/gmg137/snap7-rs/issues/ID2H7V
exploitissue-tracking

CVSS V4

Score:
6.9
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

VulDB Gitee Analyzer
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