Elevation of Privilege Vulnerability in Windows Health and Optimized Experiences Service
CVE-2026-85884

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 24h2
Windows 11 Version 25h2
Windows 11 Version 26h1
Windows 11 Version 26h2
Vendor
CVE Published:
13 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-85884?

A missing authentication issue in the Windows Health and Optimized Experiences Service allows an attacker with local access to escalate their privileges. This vulnerability can be exploited to gain unauthorized access to sensitive data and operations, threatening the overall security of the system. Implementing timely patches and updates is crucial to mitigate the risks associated with this vulnerability.

Affected Version(s)

Windows 11 Version 24H2 ARM64-based Systems 10.0.26100.0 < 10.0.26100.9711

Windows 11 Version 25H2 ARM64-based Systems 10.0.26200.0 < 10.0.26200.9711

Windows 11 version 26H1 ARM64-based Systems 10.0.28000.0 < 10.0.28000.3231

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-85884
Created by Beardhammer

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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