Microsoft Defender Remote Code Execution Vulnerability

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. Jan 12, 2021 · Catalog

   Detected

   Microsoft Defender contains an unspecified vulnerability that allows for remote code execution.

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 Defender contains an unspecified vulnerability that allows for remote code execution.

Affected

• cpe microsoft/security essentialsversion unspecified
• cpe microsoft/system center endpoint protectionversion unspecified
• cpe microsoft/system center endpoint protection2012
• cpe microsoft/windows defenderversion unspecified
• vendor Microsoft Defenderversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2021-1647

  Microsoft Defender contains an unspecified vulnerability that allows for remote code execution.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-1647

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-1647

  30-day exploitation probability 39.4%

  first.org
• NIST NVDVulnerability recordCVE-2021-1647

  Microsoft Defender Remote Code Execution Vulnerability

  nvd.nist.gov

References

• Patch · msrc.microsoft.com
• CISA note · nvd.nist.gov
• Patch · portal.msrc.microsoft.com
• US Government Resource · cisa.gov