Microsoft Skype for Business Server

11 known vulnerabilities in Microsoft Skype for Business Server, 1 critical, 1 actively exploited, with patch priority, exploit likelihood and the news…

Recently exploited

CVE-2023-41763 CVSS 5.3 medium · actively exploited Microsoft Skype for Business Privilege Escalation Vulnerability

Latest vulnerabilities

CVE-2026-69646 CVSS 8.3 high Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an…
CVE-2026-69642 CVSS 6.1 medium Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker…
CVE-2026-66308 CVSS 6.5 medium Out-of-bounds read in Skype for Business allows an authorized attacker to deny service over a network.
CVE-2026-66307 CVSS 7.5 high Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
CVE-2026-66306 CVSS 6.5 medium Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information…
CVE-2026-66305 CVSS 7.1 high Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
CVE-2026-66304 CVSS 7.5 high Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
CVE-2026-66303 CVSS 6.5 medium Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.
CVE-2026-66302 CVSS 9.8 critical External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.
CVE-2026-63523 CVSS 6.1 medium Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker…
CVE-2023-41763 CVSS 5.3 medium · actively exploited Microsoft Skype for Business Privilege Escalation Vulnerability