Risk Letters

Exploited vulnerability

CVE-2023-23397

TLP:CLEAR

Microsoft Office Outlook Privilege Escalation Vulnerability

Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.

Facts

  • Vendor: Microsoft
  • Product: Office
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 97.2 %
  • On CISA's Known Exploited Vulnerabilities list since: 14 March 2023
  • First known exploitation: 14 March 2023
  • CISA's deadline for US federal agencies: 4 April 2023
  • Weakness: CWE-294
  • First seen by Risk Letters: 14 March 2023

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