Vulnerability Details CVE-2026-66307
Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 49.2%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-66307
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cpe:2.3:a:microsoft:skype_for_business_server:2015
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cpe:2.3:a:microsoft:skype_for_business_server:2019