CVE-2026-33823: Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network

This month

CRITICAL 9.6WATCHLISTMITIGATE

CVE-2026-33823 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 authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.

Why this priority

Critical severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-285
Published	2026-05-07
Last modified	2026-10-26

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-07 22:16 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

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 · rust-opendal-core · FIXED · 0.59.1-2.fc46 · FEDORA-2026-4607543819 · source

sudo dnf upgrade --advisory=FEDORA-2026-4607543819

Fedora ELN · velocitty · FIXED · 1.0.3-2.eln159 · FEDORA-2026-edae8cd295 · source

sudo dnf upgrade --advisory=FEDORA-2026-edae8cd295

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.

Quick answers

How do I fix CVE-2026-33823?

teams: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-33823 being exploited?

CVE-2026-33823 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33823 affect?

CVE-2026-33823 affects teams. Severity is critical (CVSS 9.6). Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.

How urgent is CVE-2026-33823?

Priority 52/100. Critical severity; On your watchlist

Software pages

Microsoft Teams vulnerabilities

Related CVEs

CVE-2026-65667 CRITICAL 10.0 MITIGATE Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-62896 CRITICAL 9.6 MITIGATE Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.
CVE-2026-65768 HIGH 8.8 UPGRADE Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Teams for Android
CVE-2026-65767 HIGH 8.8 UPGRADE Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Teams for An
CVE-2026-62918 HIGH 7.5 MITIGATE Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform

References

← Back to latest CVEs