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

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CRITICAL 9.6WATCHLISTMITIGATE

CVE-2026-62896 is a critical-severity flaw (CVSS 9.6) affecting teams. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.

Why this priority

  • Critical severity
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score9.6 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.7% (top 48%)
CISA exploited listNo
WeaknessCWE-287
Published2026-08-07
Last modified2026-10-23
Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Am I affected?

Timeline

microsoft teams MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy teams || rpm -q teams || teams --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.
Fedora 46 · pspp · FIXED · 2.1.3-2.fc46 · FEDORA-2026-0d6444911b · source
sudo dnf upgrade --advisory=FEDORA-2026-0d6444911b
Fedora ELN · barman · FIXED · 3.20.1-3.eln159 · FEDORA-2026-45ecf042c2 · source
sudo dnf upgrade --advisory=FEDORA-2026-45ecf042c2
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Related CVEs

References

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