Integer Overflow Vulnerability in Mupen64Plus by Mupen64Plus Project
CVE-2025-9688

2.3LOW

Key Information:

Vendor

Mupen64Plus Project

Status
Mupen64plus
Vendor
CVE Published:
30 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9688?

A security vulnerability exists in the Mupen64Plus emulator, specifically in the function write_is_viewer located in src/device/cart/is_viewer.c. This flaw allows for an integer overflow that can be exploited to potentially escalate privileges or cause instability within the software. The attack can be initiated remotely, and while the complexity of successfully exploiting this vulnerability is deemed high, public disclosure of the exploit means it is now accessible to malicious entities. Despite early notifications sent to the vendor regarding this issue, no response was received.

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Deploy the Patch

Affected Version(s)

Mupen64Plus 2.0

Mupen64Plus 2.1

Mupen64Plus 2.2

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-2025-9688 - Proof of Concept

References

https://vuldb.com/?id.321900
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321900
signaturepermissions-required
https://vuldb.com/?submit.638592
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

GangYang Li (VulDB User)
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