CVE-2022-21965 Microsoft Teams Denial of Service Vulnerability
Attackers can cause a denial of service in Microsoft Teams on Android and iOS, requiring users to apply vendor patches.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-21965?
CVE-2022-21965 is a high-severity denial of service vulnerability in Microsoft Teams Admin Center, published on 9 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Microsoft Teams Denial of Service Vulnerability
Which versions are affected by CVE-2022-21965?
It affects 1 product.
Products include Microsoft Teams.
How do I fix CVE-2022-21965?
No fix has been published for CVE-2022-21965 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-21965 being exploited?
There is no known exploitation of CVE-2022-21965 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Teams Admin Center
- CVE-2026-65667 Microsoft Teams Elevation of Privilege Vulnerability
- CVE-2026-62896 Microsoft Teams Elevation of Privilege Vulnerability
- CVE-2026-33823 Microsoft Team Events Portal Information Disclosure Vulnerability
- CVE-2026-65767 Microsoft Teams for Android Spoofing Vulnerability
- CVE-2026-65768 Microsoft Teams Remote Code Execution Vulnerability
Sources
Also known as GHSA-mrg4-hwp5-c6hc.