Vulnerability · Published Feb 19, 2026 · Assigned by microsoft
CVE-2026-21535Microsoft Teams Information Disclosure Vulnerability
High 8.2
In plain English
A high-severity improper access control 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 51% of all known vulnerabilities).
Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.7%top 48.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Teams | - |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C
References
- Microsoft Teams Information Disclosure Vulnerability vendor-advisory, patch