What is CVE-2026-62918?

CVE-2026-62918 is a high-severity vulnerability in Microsoft Teams, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-08-07.

How severe is CVE-2026-62918?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Microsoft Teams

CVE-2026-62918

Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Microsoft Teams
Microsoft Teams

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-62918?: CVE-2026-62918 is a high-severity vulnerability in Microsoft Teams, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-08-07.
How severe is CVE-2026-62918?: High severity. CVSS v3 base score is 7.5 out of 10.