CVE-2025-21354 Microsoft Excel Remote Code Execution Vulnerability
Attackers can execute arbitrary code by exploiting a flaw in Microsoft Excel, requiring users to open a malicious file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-21354?
CVE-2025-21354 is a high-severity code injection vulnerability in Microsoft 365 Apps, published on 14 Jan 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Microsoft Excel Remote Code Execution Vulnerability
Weakness: CWE-822
Which versions are affected by CVE-2025-21354?
It affects 4 products.
Products include Microsoft 365 Apps, Microsoft Office, Microsoft Office Long Term Servicing Channel, Microsoft Office Online Server.
How do I fix CVE-2025-21354?
No fix has been published for CVE-2025-21354 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-21354 being exploited?
There is no known exploitation of CVE-2025-21354 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-w3rx-f2fq-82cx.