What’s Vulnerable › Vulnerabilities

CVE-2025-9688: Mupen64Plus is_viewer.c write_is_viewer integer overflow

• Severity: medium (CVSS 5.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-30 · updated 2026-10-19
• Weakness: CWE-189

Description

A security vulnerability has been detected in Mupen64Plus up to 2.6.0. The affected element is the function write_is_viewer of the file src/device/cart/is_viewer.c. The manipulation leads to integer overflow. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been disclosed publicly and may be used. The identifier of the patch is 3984137fc0c44110f1ef876adb008885b05a6e18. To fix this issue, it is recommended to deploy a patch.

Affected products

• Mupen64Plus: 2.0, 2.1, 2.2, 2.3, 2.4, 2.5 (+1)

References

• https://github.com/Giles-one/mupen64plusEscape/tree/main/BUG10
• https://github.com/mupen64plus/mupen64plus-core/commit/3984137fc0c44110f1ef876adb008885b05a6e18
• https://vuldb.com/?ctiid.321900
• https://vuldb.com/?id.321900
• https://vuldb.com/?submit.638592

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