CVE-2025-59229 Microsoft Office Denial of Service Vulnerability
An uncaught exception in Microsoft Office allows local attackers to cause a denial of service, requiring users to apply vendor patches.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-59229?
CVE-2025-59229 is a medium-severity denial of service vulnerability in Microsoft 365 Apps, published on 14 Oct 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Uncaught exception in Microsoft Office allows an unauthorized attacker to deny service locally.
Weakness: CWE-248
Which versions are affected by CVE-2025-59229?
It affects 2 products.
Products include Microsoft 365 Apps, Microsoft Office Long Term Servicing Channel.
How do I fix CVE-2025-59229?
No fix has been published for CVE-2025-59229 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-2025-59229 being exploited?
There is no known exploitation of CVE-2025-59229 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-pv25-8q8x-9236.