# CVE-2026-129255: CoolerMaster MASTERPLUS+ Device Driver WinRing0x64.sys sub_11504 default permission

Status: published. Published: 2026-11-14. Updated: 2026-11-14.

A vulnerability was identified in CoolerMaster MASTERPLUS+ 1.9.6. This affects the function sub_11504 in the library WinRing0x64.sys of the component Device Driver. The manipulation of the argument PhysicalAddress leads to incorrect default permissions. The attack can only be performed from a local environment. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- CoolerMaster / MASTERPLUS+: 1.9.6 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 9.3 (critical); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X; source: CNA: VulDB

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 8.8 (high); CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 6.8 (medium); AV:L/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-276, CWE-266

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/437286 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/437286/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-129255 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1042970 (CNA: VulDB; third-party-advisory)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-129255; retrieved 2026-11-14; source updated 2026-11-14

Revision: a8f7b860d8c251c29d6a274a2b4f38054133a402ec79132cb5d51ee03dba1607

Canonical: https://y2.dev/cve/CVE-2026-129255

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.