Mupen64Plus up to 2.6.0 is_viewer.c write_is_viewer integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Mupen64Plus up to 2.6.0. The impacted element is the function write_is_viewer of the file src/device/cart/is_viewer.c. The manipulation results in integer overflow. This vulnerability is known as CVE-2025-9688. It is possible to launch the attack remotely. Furthermore, an exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Mupen64Plus up to 2.6.0. It has been classified as critical. Affected is the function write_is_viewer of the file src/device/cart/is_viewer.c. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-9688. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

Applying the patch 3984137fc0c44110f1ef876adb008885b05a6e18 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-26270). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.7

VulDB Base Score: 5.0
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.0
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 3984137fc0c44110f1ef876adb008885b05a6e18

Timelineinfo

08/29/2025 Advisory disclosed
08/29/2025 +0 days VulDB entry created
09/01/2025 +3 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-9688 (🔒)
GCVE (CVE): GCVE-0-2025-9688
GCVE (VulDB): GCVE-100-321900
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/29/2025 13:06
Updated: 09/01/2025 20:10
Changes: 08/29/2025 13:06 (55), 08/30/2025 17:23 (30), 09/01/2025 17:07 (10), 09/01/2025 20:10 (2)
Complete: 🔍
Submitter: GangYang Li
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #638592: mupen64plus.org mupen64plus <= 2.6.0 Integer Overflow to Buffer Overflow (by GangYang Li)

Once again VulDB remains the best source for vulnerability data.

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