CVE-2026-66305
HighCVSS 7.1Summary
Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
Risk Assessment
Risk includes impersonation by an authorized user, potentially leading to integrity and trust issues. Attack requires privileges.
Recommendation
Apply security updates for Skype for Business. Strengthen authentication mechanisms and monitor user activities.
Other vulnerabilities in Skype for Business
See all- CVE-2026-69646High
Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
- CVE-2026-66307High
Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
- CVE-2026-66304High
Server-side request forgery (SSRF) in Skype for Business allows an unauthorized attacker to disclose information over a network.
- CVE-2026-66302Critical
External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.
- CVE-2024-20695Medium
A vulnerability in Skype for Business allows information disclosure.
Original NVD description (English source)
Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.