CVE-2021-40454 Rich Text Edit Control Information Disclosure Vulnerability
An attacker can exploit the Rich Text Edit Control to disclose sensitive information from Microsoft Office and Windows systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-40454?
CVE-2021-40454 is a medium-severity vulnerability in Microsoft 365 Apps, published on 13 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Rich Text Edit Control Information Disclosure Vulnerability
Weakness: CWE-312
Which versions are affected by CVE-2021-40454?
It affects 11 products.
Products include Microsoft 365 Apps, Microsoft Office, Microsoft Windows 10, Microsoft Windows 11, Microsoft Windows 8.1, Microsoft Windows Rt 8.1 and 5 more.
How do I fix CVE-2021-40454?
No fix has been published for CVE-2021-40454 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-40454 being exploited?
There is no known exploitation of CVE-2021-40454 in the wild and no public exploit code.
Other vulnerabilities in Microsoft 365 Apps
- CVE-2024-21413 Microsoft Outlook Improper Input Validation
- CVE-2023-23397 Microsoft Office Outlook Privilege Escalation
- CVE-2024-38189 Microsoft Project Remote Code Execution Vulnerability
- CVE-2023-35311 Microsoft Outlook Security Feature Bypass
- CVE-2026-21514 Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision
Sources
Also known as GHSA-j978-qg6w-8m3g.