CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-65667: Microsoft Teams Elevation of Privilege Vulnerability

criticalCVSS 10CVE-2026-65667
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.

CSIRTS triage

vendor: Microsoftproduct: Microsoft TeamsPrivilege escalation
What
Missing authorization allows unauthorized attackers to elevate privileges over a network.
Who is affected
All Microsoft Teams deployments are affected.
Urgency
Critical severity (CVSS 10) with no current exploitation reported; immediate patching required.
Action
Apply Microsoft security updates for Microsoft Teams immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Microsoft Teams

Get an email when a new Microsoft Teams advisory drops — max one per day, one-click unsubscribe.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 10
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65667

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-65667coverage & 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