CVE-2026-21535: high-severity vulnerability in Microsoft Teams
Microsoft Teams Information Disclosure Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.7%
Improper access control in Microsoft Teams allows an unauthorized attacker to disclose information over a network.
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
Affected products
Microsoft · Microsoft TeamsRelated CVEs — Microsoft Teams
In the same product, most dangerous first.
CVE-2020-17091HIGHMicrosoft Teams Remote Code Execution VulnerabilityEPSS 1.9%CVE-2023-24881MEDIUMMicrosoft Teams Information Disclosure VulnerabilityEPSS 1.5%CVE-2026-65667CRITICALMicrosoft Teams Elevation of Privilege VulnerabilityEPSS 0.8%CVE-2026-33823CRITICALMicrosoft Team Events Portal Information Disclosure VulnerabilityEPSS 0.7%CVE-2026-62896CRITICALMicrosoft Teams Elevation of Privilege VulnerabilityEPSS 0.7%CVE-2026-62918HIGHMicrosoft Teams Spoofing VulnerabilityEPSS 0.5%