Risk Letters

Exploited vulnerability

CVE-2022-41040

TLP:CLEAR

Microsoft Exchange Server Server-Side Request Forgery Vulnerability

Microsoft Exchange Server allows for server-side request forgery. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41082 which allows for remote code execution.

Facts

  • Vendor: Microsoft
  • Product: Exchange Server
  • CVSS: 8.8
  • 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-918
  • First seen by Risk Letters: 30 September 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