What is CVE-2021-26421?

CVE-2021-26421 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Skype for Business and Lync Spoofing Vulnerability

Which CVE IDs does CVE-2021-26421 cover?

CVE-2021-26421 covers the following CVE IDs: CVE-2021-26421. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2021-26421?

CVE-2021-26421 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2021-26421?

CVE-2021-26421 affects 2 products, including: Microsoft Lync Server 2013 CU10; Skype for Business Server 2015 CU11.

CVE-2021-26421HighCVSS 6.5

Skype for Business and Lync Spoofing Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 11, 2021

Last Modified

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🔗 CVE IDs covered (1)

CVE-2021-26421 →

🎯 Affected products2

Microsoft Lync Server 2013 CU10
Skype for Business Server 2015 CU11

✅ Remediation

KB5003729 (Security Update) — fixed build 2046.369 KB5003729 (Security Update) — fixed build 8308.1144

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26421
patchhttps://www.microsoft.com/download/details.aspx?familyid=de77f3bc-efd5-4dab-a2fb-81e2894b0937
patchhttps://www.microsoft.com/download/details.aspx?familyid=dac7c777-fe8a-45a2-9a82-07a2e15c298f