← Back

CVE-2026-66307

nvd nist
Published: Sep 8, 2026Modified: Sep 16, 2026

JSON object

Loading...
7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: secure@microsoft.com (Secondary)

Description

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

Affected (6)

Microsoft
2 products
Skype For Business Server
Skype For Business Server Subscription Edition
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Microsoft
Skype For Business Server
Version 2015 cumulative_update_13
Skype For Business Server
Version 2015 cumulative_update_13_hotfix_2
Configuration B
3 vulnerable
Vulnerable SoftwareAffected Versions
Microsoft
Skype For Business Server
Version 2019 cumulative_update_8
Skype For Business Server
Version 2019 cumulative_update_8_hotfix1
Skype For Business Server
Version 2019 cumulative_update_8_hotfix2
Configuration C
1 vulnerable
Vulnerable SoftwareAffected Versions
Skype For Business Server Subscription Edition
Version 7.0.2046.849

Related CWEs

CWE-191
Integer Underflow (Wrap or Wraparound)
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

References (1)

Source: secure@microsoft.com
PatchVendor Advisory

Timeline

No history available yet.