CVE-2026-63523 Skype for Business Spoofing Vulnerability Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network. EPSS 0.01 CVE-2026-63523 US tg: zranitelnost 8. 9. 2026 · zachyceno 19:32 · Microsoft Security · CVE-2026-63523 Skype for Business Spoofing Vulnerability