CVE-2026-69646

Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.

Score

CVSS 3.1 8.3 High

Status

Analyzed - secure@microsoft.com

Published

2026-09-08

Last modified

2026-10-14

Weaknesses

CWE-347

Affected products

• Skype For Business Server (Microsoft)
• Skype For Business Server 2015 (Microsoft)
• Skype For Business Server 2019 (Microsoft)
• Skype For Business Server Subscription Edition (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69646