CVE-2026-66305
Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C
- EPSS probability
- 0.30%
- CWE
- CWE-603
- Published
- 2026-09-08
- Last modified
- 2026-09-10
Affected products
- Microsoft Skype for Business Server 2015 CU13
- Microsoft Skype for Business Server 2019 CU8
- Microsoft Skype for Business Server Subscription Edition CU1
Weakness type
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