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CVE-2026-69846

Windows Secure Kernel Mode Elevation of Privilege Vulnerability

Published: Sep 8, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-190

Description

Integer overflow or wraparound in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

In plain language

AI Act now

CVE-2026-69846 is a Windows local privilege escalation bug that lets an attacker with an account on the machine gain higher privileges; if your business computers are not fully up to date, you should act now.

Executive summary

CVE-2026-69846 is a local privilege escalation flaw in Windows Secure Kernel Mode (CWE-190) where an integer overflow/wraparound can let an authorized attacker elevate privileges on the affected Windows versions.

If affected, business impact
Full admin-level takeoverMalware persistenceData theft riskSystem disruption

What to do now

  1. Check whether any affected device is on an unpatched Windows build by viewing the installed OS version/build number (Settings → System → About, or winver).
  2. Match that build to the vendor’s fixed build list and confirm it is at-or-above the corresponding fixed version for your edition (Windows 10/11 or Server).
  3. Install the latest available Windows security updates, then re-check the build number until it reaches the fixed version for your branch:
    • Windows 10: 10.0.14393.9512 / 10.0.17763.9245 / 10.0.19044.7725 / 10.0.19045.7725
    • Windows 11: 10.0.22631.7582 / 10.0.26100.9445 / 10.0.26200.9445 / 10.0.28000.2954
    • Windows Server 2016: 10.0.14393.9512
    • Windows Server 2019: 10.0.17763.9245
    • Windows Server 2022: 10.0.20348.5622
    • Windows Server 2025: 10.0.26100.33438
  4. If you can’t patch immediately, restrict local logins and tighten access to endpoints (especially admin/privileged accounts) while you schedule the update rollout.
Usually a quick update

CVSS Vector Breakdown

AV:LAC:LPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

Affected Products

and 10 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

3

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