High severity7.5NVD Advisory· Published Sep 8, 2026
Skype for Business and Lync Denial of Service Vulnerability
CVE-2026-66307
Description
Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
Affected products
1Patches
Vulnerability mechanics
News mentions
1- Massive Microsoft Patch Tuesday September 2026 – 973 Vulnerabilities Fixed, Including 2 Zero-DaysCyber Security News · Sep 8, 2026