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Findings

CVE-2021-31955

Microsoft Windows Kernel Information Disclosure Vulnerability

Published Jun 8, 2021 · updated Jun 16, 2026 · microsoft windows 10 1809

Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 8, 2021 · Catalog

    Detected

    Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Nov 17, 2021 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.

Required action

Apply updates per vendor instructions.

CISA due date Nov 17, 2021

Affected

  • cpe microsoft/windows 10 1809version unspecified
  • cpe microsoft/windows 10 1909version unspecified
  • cpe microsoft/windows 10 2004version unspecified
  • cpe microsoft/windows 10 20h2version unspecified
  • cpe microsoft/windows 10 21h1version unspecified
  • cpe microsoft/windows server 2004version unspecified
  • cpe microsoft/windows server 2019version unspecified
  • cpe microsoft/windows server 20h2version unspecified
  • vendor Microsoft Windowsversion unspecified

Sources

  • CISA KEVConfirmed exploitationCVE-2021-31955

    Microsoft Windows Kernel contains an unspecified vulnerability that allows for information disclosure. Successful exploitation allows attackers to read the contents of kernel memory from a user-mode process.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-31955

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-31955

    30-day exploitation probability 81.1%

    first.org
  • NIST NVDVulnerability recordCVE-2021-31955

    Windows Kernel Information Disclosure Vulnerability

    nvd.nist.gov

References