Out-of-bounds Read in Microsoft Skype For Business Server 2015 Cu13

CVE-2026-66308

Out-of-bounds read in Skype for Business allows an authorized attacker to deny service over a network.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-66308?
CVE-2026-66308 is a medium-severity vulnerability in Microsoft Skype For Business Server 2015 Cu13, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-09-08.
How severe is CVE-2026-66308?
Medium severity. CVSS v3 base score is 6.5 out of 10.