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CVE-2026-62896: Microsoft Teams Elevation of Privilege Vulnerability

criticalCVSS 9.6CVE-2026-62896
Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.

CSIRTS triage

vendor: Microsoftproduct: Microsoft TeamsPrivilege escalation
What
Improper authentication in Teams allows authorized attackers to elevate privileges over the network.
Who is affected
All Microsoft Teams deployments are affected.
Urgency
Critical severity (CVSS 9.6); not yet exploited but requires immediate remediation.
Action
Apply the latest security patch from Microsoft for Teams.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.6
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62896

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-62896coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Teams Elevation

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center