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CVE-2026-62786

Win32k Information Disclosure Vulnerability

Published: Aug 11, 2026Updated: Aug 16, 2026 Sources: CVE List NVDCWE-125

Description

Out-of-bounds read in Windows Win32K allows an authorized attacker to disclose information locally.

In plain language

AI Act now

CVE-2026-62786 is a Windows flaw that lets a low-privilege attacker read sensitive memory data on the same machine; if you run supported versions and haven’t installed the August 2026 fixes, you should patch urgently.

Executive summary

CVE-2026-62786 is a local information disclosure in the Windows kernel graphics driver (Win32K) caused by incorrect memory-boundary handling, enabling an authenticated/low-privilege attacker to read confidential data from protected memory.

If affected, business impact
Sensitive data theft from memoryAccount or credential exposure riskCompromise of confidential business dataIncreased ransomware likelihood

What to do now

  1. Check your Windows version and current build/patch level (Settings → System → About, or via your update history).
  2. If you are on Windows 10, update so you are at one of these fixed builds: 10.0.14393.9418, 10.0.17763.9115, 10.0.19044.7663, or 10.0.19045.7663.
  3. If you are on Windows 11, update so you are at one of these fixed builds: 10.0.22631.7517, 10.0.26100.9106, 10.0.26200.9106, or 10.0.28000.2704.
  4. If you are on Windows Server, update so you are at one of these fixed builds: Windows Server 2016/2012/2012 R2 → 10.0.14393.9418, Windows Server 2019 → 10.0.17763.9115, Windows Server 2022 → 10.0.20348.5440, Windows Server 2025 → 10.0.26100.33222.
  5. After updating, verify the machine reports the patched build and confirm your Windows Update shows the August 2026 security fixes applied.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None

Weaknesses

Affected Products

and 25 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

2

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