Risk Letters

Exploited vulnerability

CVE-2021-33766

TLP:CLEAR

Microsoft Exchange Server Information Disclosure

Microsoft Exchange Server contains an information disclosure vulnerability which can allow an unauthenticated attacker to steal email traffic from target.

Facts

  • Vendor: Microsoft
  • Product: Exchange Server
  • CVSS: 7.3
  • EPSS (probability of exploitation within 30 days): 98.2 %
  • On CISA's Known Exploited Vulnerabilities list since: 18 January 2022
  • First known exploitation: 18 January 2022
  • CISA's deadline for US federal agencies: 1 February 2022
  • Weakness: CWE-287
  • First seen by Risk Letters: 18 January 2022

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

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