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CVE-2026-69906

Windows Secure Kernel Mode Elevation of Privilege Vulnerability

Published: Sep 8, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-122

Description

Heap-based buffer overflow in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

In plain language

AI Act now

CVE-2026-69906 is a Windows bug that can let someone with local access gain higher privileges; patching is important for most organizations because it targets core Windows security.

Executive summary

CVE-2026-69906 is a heap-based buffer overflow in Windows Secure Kernel Mode that can be triggered by an authorized local attacker to elevate privileges on affected Windows 10/11 and Windows Server versions; no public exploit is on record and it is not listed in CISA KEV.

If affected, business impact
Local admin-level takeoverWidespread workstation/server riskPossible full system compromiseOperational disruption from breach

What to do now

  1. Check your exact Windows version/build on each affected device (Settings → System → About, or run “winver”) and compare it to the fixed versions listed in the MS update guide.
  2. For Windows 10, update until you reach one of these fixed builds: 10.0.14393.9512, 10.0.17763.9245, 10.0.19044.7725, or 10.0.19045.7725.
  3. For Windows 11, update until you reach one of these fixed builds: 10.0.22631.7582, 10.0.26100.9445, 10.0.26200.9445, or 10.0.28000.2954.
  4. For Windows Server, update until you reach one of these fixed builds: Server 2016 (10.0.14393.9512), Server 2019 (10.0.17763.9245), Server 2022 (10.0.20348.5622), or Server 2025 (10.0.26100.33438).
  5. If you can’t patch right away, isolate systems with any untrusted local access (visitor laptops, temporary technician access, shared admin consoles) until updates are applied.
Patch / advisory 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

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

3

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