VULNERABILITY INTELLIGENCE

CVE-2026-66307

CVSS score7.5 HIGH
EPSS probability1.17%
CISA KEVNot currently listed
Published2026-09-08
Last modified2026-09-16
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.

Weakness classification

  • secure@microsoft.com: CWE-191

Primary references