CVE-2025-9688
Mupen64Plus is_viewer.c write_is_viewer integer overflow
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Mupen64Plus is_viewer.c write_is_viewer integer overflow
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.
- Record
CVE-2025-9688- CVSS 4.0
- 2.3 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C - CVSS 3.0
- 5.0 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C - CVSS 2.0
- 5.1
AV:N/AC:H/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C - Weakness
- CWE-190, CWE-189
- Updated
- 2026-11-02
EUVDEUVD-2025-26270
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.
- Record
EUVD-2025-26270- CVSS 4.0
- 2.3 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-449c-3xhq-m2q6
A security vulnerability has been detected in Mupen64Plus up to 2.6.0. The affected element is...
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.
- Record
GHSA-449c-3xhq-m2q6- CVSS 4.0
- 1.3 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-9688- CVSS 4.0
- 1.3 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L - CVSS 2.0
- 5.1 Medium
AV:N/AC:H/Au:N/C:P/I:P/A:P - Weakness
- CWE-189, CWE-190
- Updated
- 2026-11-02
OSV
Mupen64Plus is_viewer.c write_is_viewer integer overflow
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.
- Record
CVE-2025-9688- CVSS 4.0
- 1.3 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - Weakness
- CWE-189, CWE-190
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2025-9688
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.
- Record
DEBIAN-CVE-2025-9688- CVSS 4.0
- 1.3 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-9688
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.
- Record
UBUNTU-CVE-2025-9688- CVSS 4.0
- 1.3 Low
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVopenSUSE-SU-2025:15513-1 No score
libmupen64plus-devel-2.6.0-2.1 on GA media
These are all security issues fixed in the libmupen64plus-devel-2.6.0-2.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2025:15513-1- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mupen64plus-coreDebian:12 |
All versions, plus listed versions 2.5.9+341+gf82b37bf-12.6.0-12.6.0-22.6.0-32.6.0-4 |
None known |
mupen64plus-coreDebian:13 |
All versions, plus listed versions 2.6.0-22.6.0-32.6.0-4 |
None known |
mupen64plus-coreDebian:14 |
All versions, plus listed versions 2.6.0-22.6.0-32.6.0-4 |
None known |
mupen64plus-coreUbuntu:16.04:LTS |
All versions, plus listed versions 2.5-12.5-22.5-32.5-4 |
None known |
mupen64plus-coreUbuntu:18.04:LTS |
All versions, plus listed versions 2.5-4build1 |
None known |
mupen64plus-coreUbuntu:20.04:LTS |
All versions, plus listed versions 2.5-62.5-6build1 |
None known |
mupen64plus-coreUbuntu:22.04:LTS |
All versions, plus listed versions 2.5-72.5-8 |
None known |
mupen64plus-coreUbuntu:24.04:LTS |
All versions, plus listed versions 2.5.9+341+gf82b37bf-12.5.9+341+gf82b37bf-1build22.5.9+341+gf82b37bf-1build3 |
None known |
mupen64plus-coreUbuntu:25.10 |
All versions, plus listed versions 2.6.0-2 |
None known |
mupen64plus-coreUbuntu:26.10 |
All versions, plus listed versions 2.6.0-2build12.6.0-3 |
None known |
mupen64plus-coreUbuntu:26.04:LTS |
All versions, plus listed versions 2.6.0-22.6.0-2build1 |
None known |
mupen64plusopenSUSE:Tumbleweed |
before 2.6.0-2.1 | 2.6.0-2.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-9688 is a low vulnerability (CVSS 2.3) in mupen64plus, published August 30, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in mupen64plus 2.6.0-2.1.