Released: September 2026 Skype for Business Server Security Updates

Microsoft has released Security Updates (SUs) for vulnerabilities found in: Skype for Business Server Subscription Edition (SE) Skype for Business Server 2019 Skype for Business Server 2015 SUs are available for the following specific versions of Skype for Business Server: Skype for Business SE CU1 Security Update 1 Skype for Business Server 2019 CU8 Security Update 3 (to access, organization must purchase Extended Security Update (ESU)) Skype for Business Server 2015 CU13 Security Update 3 (to access, organization must purchase Extended Security Update (ESU)) The September 2026 SUs address vu