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    CVE-2026-20819

    Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.

    Published:Jan 13, 2026
    Last Modified:Jul 30, 2026
    EPS:Jan 13, 2026
    EPSS Score:0.00547
    CVSS Score:5.5

    Affected Products

    Vendor
    Microsoft
    Product
    Windows 11 23H2
    Vendor
    Microsoft
    Product
    Windows 11 23h2
    Vendor
    Microsoft
    Product
    Windows 11 24H2
    Vendor
    Microsoft
    Product
    Windows 11 24h2
    Vendor
    Microsoft
    Product
    Windows 11 25H2
    Vendor
    Microsoft
    Product
    Windows 11 25h2

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-822 Untrusted Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-129 Pointer Manipulation

    Related CVEs

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    CVE-2026-84000 (CVSS 7.8) — Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to execute code local…
    CVE-2026-83997 (CVSS 8.1) — Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.…
    CVE-2026-83995 (CVSS 7.8) — Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.…
    CVE-2026-83992 (CVSS 8.8) — Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code over a…
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    CVE-2026-83989 (CVSS 7.5) — Out-of-bounds read in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to deny servi…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High