Vulnerability · Published May 7, 2026 · Assigned by microsoft
CVE-2026-33823Microsoft Team Events Portal Information Disclosure Vulnerability
Critical 9.6
In plain English
A critical-severity security flaw in Microsoft Teams from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)9.6Critical
Exploit odds (30 days)0.7%top 45.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Teams | - |
Weakness: CWE-285 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
References
- Microsoft Team Events Portal Information Disclosure Vulnerability vendor-advisory, patch