CoolerMaster
Device Driver WinRing0x64.sys sub_11504 default permission
Not on CISA's list of exploited flaws, and not in the news we track.
CVE-2026-129255Critical9.3
Reading the vendor advisory
Black Shard's team can check your exposure to CVE-2026-129255 and take the fix off your plate.
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.
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Severity
9.3of 10, critical
Updated 14 Nov 2026, 15:46 UTC, 33 of 36 sources answering.
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