Integer overflow in Mupen64Plus - CVE-2025-9688
Published: October 29, 2025
Vulnerability identifier: #VU117793
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-9688
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: mupen64plus
Affected software:
Mupen64Plus
Mupen64Plus
Detailed vulnerability description
The vulnerability allows a malicious guest to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow within the write_is_viewer() function in src/device/cart/is_viewer.c. A malicious guest can trigger an integer overflow and execute arbitrary code on the target system.
How to mitigate CVE-2025-9688
Install updates from vendor's website.