CVE-2026-20819: CWE-822: Untrusted Pointer Dereference in Microsoft Windows 11 version 22H3
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20819) arises from an untrusted pointer dereference within the Windows Virtualization-Based Security (VBS) Enclave in Windows 11 version 22H3 (build 10.0.22631.0). An authorized local attacker with low privileges can exploit this flaw to disclose information locally. The CVSS 3.1 base score is 5.5, reflecting medium severity, with high impact on confidentiality but no impact on integrity or availability. The vulnerability has been officially published and a patch is available from Microsoft.
Potential Impact
The vulnerability allows an authorized local attacker to disclose sensitive information by exploiting an untrusted pointer dereference in the VBS Enclave. There is no impact on system integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft to remediate this vulnerability. It is recommended to apply the security update for Windows 11 version 22H3 (build 10.0.22631.0) as soon as possible to mitigate the risk of information disclosure.
CVE-2026-20819: CWE-822: Untrusted Pointer Dereference in Microsoft Windows 11 version 22H3
Description
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20819) arises from an untrusted pointer dereference within the Windows Virtualization-Based Security (VBS) Enclave in Windows 11 version 22H3 (build 10.0.22631.0). An authorized local attacker with low privileges can exploit this flaw to disclose information locally. The CVSS 3.1 base score is 5.5, reflecting medium severity, with high impact on confidentiality but no impact on integrity or availability. The vulnerability has been officially published and a patch is available from Microsoft.
Potential Impact
The vulnerability allows an authorized local attacker to disclose sensitive information by exploiting an untrusted pointer dereference in the VBS Enclave. There is no impact on system integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft to remediate this vulnerability. It is recommended to apply the security update for Windows 11 version 22H3 (build 10.0.22631.0) as soon as possible to mitigate the risk of information disclosure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.373Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668adba60475309f9adf97
Added to database: 1/13/2026, 6:11:39 PM
Last enriched: 4/3/2026, 12:42:02 PM
Last updated: 5/10/2026, 9:25:13 AM
Views: 81
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