Risk Letters

Exploited vulnerability

CVE-2021-31166

TLP:CLEAR

Microsoft HTTP Protocol Stack Remote Code Execution Vulnerability

Microsoft HTTP Protocol Stack contains a vulnerability in http.sys that allows for remote code execution.

Facts

  • Vendor: Microsoft
  • Product: HTTP Protocol Stack
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 99.9 %
  • On CISA's Known Exploited Vulnerabilities list since: 6 April 2022
  • First known exploitation: 6 April 2022
  • CISA's deadline for US federal agencies: 27 April 2022
  • Weakness: CWE-416
  • First seen by Risk Letters: 6 April 2022

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD