All vulnerabilities
CVE-2023-41763

Microsoft Skype for Business Privilege Escalation Vulnerability

Microsoft Skype for Business
Open in ThreatlineRecord JSON
CVSS
5.3Medium
ExploitationExploited in the wildAdded to KEV 10 Oct 2023CISA KEV
Exploit odds (EPSS)90.5%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in6.0.9319.869Also 7.0.246.530CVE List
Federal deadline31 Oct 2023Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

  • 6.0.9319.869Skype for Business Server 2015 CU13CVE List
  • 7.0.246.530Skype for Business Server 2019 CU7CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 10 Oct 2023Added to CISA KEVCISA KEV
  2. 10 Oct 2023, 17:07 UTCPublishedCVE List

Public exploit code and templates 1

  • Scanner templateSkype for Business 2019 (SfB) - Blind Server-side Request ForgeryNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Microsoft Skype for Business contains an unspecified vulnerability that allows for privilege escalation.

Text from CVE List

Affected versions 2

  • Skype for Business Server 2015 CU13affected: 9319.0 before 6.0.9319.869CVE List
  • Skype for Business Server 2019 CU7affected: 2046.0 before 7.0.246.530CVE List

References 4