CVE-2023-21721 Microsoft OneNote Elevation of Privilege Vulnerability

Medium 6.5 Published 14 Feb 2023 Updated 19 Aug 2026

Attackers can exploit an authentication bypass in Microsoft OneNote for Android to escalate privileges on the device.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-21721?

CVE-2023-21721 is a medium-severity authentication bypass vulnerability in Microsoft OneNote for Android, published on 14 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Microsoft OneNote Elevation of Privilege Vulnerability

Weakness: CWE-287

Which versions are affected by CVE-2023-21721?

It affects 1 product.

Products include Microsoft Onenote.

How do I fix CVE-2023-21721?

No fix has been published for CVE-2023-21721 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2023-21721 being exploited?

There is no known exploitation of CVE-2023-21721 in the wild and no public exploit code.

Sources

Also known as GHSA-554f-p6jr-9fv8.