CVE-2026-45649 Office for Android Spoofing Vulnerability
An unauthorized attacker can perform local spoofing in Microsoft Office for Android due to improper access control.
- 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-2026-45649?
CVE-2026-45649 is a high-severity missing authorization vulnerability in Microsoft Excel, published on 9 Jun 2026. 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
Improper access control in Office for Android allows an unauthorized attacker to perform spoofing locally.
Weakness: CWE-284
Which versions are affected by CVE-2026-45649?
It affects 3 products.
Products include Microsoft Excel, Microsoft Powerpoint, Microsoft Word.
How do I fix CVE-2026-45649?
No fix has been published for CVE-2026-45649 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-45649 being exploited?
There is no known exploitation of CVE-2026-45649 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Excel
Sources
Also known as GHSA-4363-fqg7-xrx3.