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CVE-2026-62918: Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform

47
This month
HIGH 7.5REMOTEWATCHLISTMITIGATE

CVE-2026-62918 is a high-severity flaw (CVSS 7.5) affecting teams. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.5% (top 58%)
CISA exploited listNo
WeaknessCWE-347
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 · rubygem-eventmachine · FIXED · 1.2.7-37.fc46 · FEDORA-2026-7194c202a2 · source
sudo dnf upgrade --advisory=FEDORA-2026-7194c202a2
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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