Risk Letters

Exploited vulnerability

CVE-2022-41082

TLP:CLEAR

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server contains an unspecified vulnerability that allows for authenticated remote code execution. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41040 which allows for the remote code execution.

Facts

  • Vendor: Microsoft
  • Product: Exchange Server
  • CVSS: 8
  • EPSS (probability of exploitation within 30 days): 100 %
  • On CISA's Known Exploited Vulnerabilities list since: 30 September 2022
  • First known exploitation: 30 September 2022
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 21 October 2022
  • Weakness: CWE-502
  • First seen by Risk Letters: 30 September 2022

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