Stack-based Buffer Overflow in vgmstream Affects Audio Processing Capabilities
CVE-2026-86514

5.3MEDIUM

Key Information:

Vendor

vgmstream

Status
Vgmstream
Vendor
CVE Published:
8 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86514?

A vulnerability has been detected in vgmstream, specifically in versions up to r2117, affecting the sscanf function within the txth.c component. This weakness may allow attackers to manipulate data and initiate a stack-based buffer overflow remotely. The potential exploitation of this vulnerability poses significant risks, as public exploit methods have been released. To mitigate this threat, the deployment of a specific patch (4669d37a6af94866f6f0628678f9f90d46954e8b) is recommended.

Affected Version(s)

vgmstream r2117

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-2026-86514 - Proof of Concept

References

https://vuldb.com/vuln/399668
vdb-entrytechnical-description
https://vuldb.com/vuln/399668/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86514
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ni-liao (VulDB User)
.