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CVE-2022-26910: Skype for Business and Lync Spoofing Vulnerability

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-15 · updated 2026-06-17
• Weakness: CWE-290

Description

Skype for Business and Lync Spoofing Vulnerability

Affected products

• Microsoft Skype for Business Server 2019 CU7: 2015-cu12, 2019-cu6
• Microsoft Skype for Business Server 2015 CU12: from 9319.0 before 9319.628 — fixed in 9319.628
• Microsoft Skype for Business Server 2019 CU6: from 2046.0 before 2046.396 — fixed in 2046.396

How to fix

Upgrade to a fixed version: Microsoft Skype for Business Server 2015 CU12 9319.628; Microsoft Skype for Business Server 2019 CU6 2046.396. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26910
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26910

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