CVE-2023-41763
Published: October 10, 2023
Official Description
Microsoft Skype for Business contains an unspecified vulnerability that allows for privilege escalation.
CISA KEV Advisory
Microsoft Skype for Business Privilege Escalation Vulnerability
Microsoft Skype for Business contains an unspecified vulnerability that allows for privilege escalation.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This high-severity vulnerability in Microsoft Skype for Business allows an attacker to elevate their privileges on an affected system. The high EPSS score of 0.12665 indicates a significant likelihood of exploitation, making this an urgent concern for administrators.
This vulnerability is actively being exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities Catalog, confirming its active use by threat actors.
Administrators should apply the latest security updates for Microsoft Skype for Business to address this privilege escalation flaw.
Technical Analysis
CVE-2023-41763 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2023-41763 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-41763 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1