CVE-2025-55243 Microsoft OfficePlus Spoofing Vulnerability
An unauthorized attacker can exploit sensitive information exposure in Microsoft OfficePLUS to perform network-based spoofing attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-55243?
CVE-2025-55243 is a high-severity vulnerability in Microsoft OfficePLUS, published on 9 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Exposure of sensitive information to an unauthorized actor in Microsoft Office Plus allows an unauthorized attacker to perform spoofing over a network.
Weakness: CWE-200
Which versions are affected by CVE-2025-55243?
It affects 1 product.
Products include Microsoft Officeplus.
How do I fix CVE-2025-55243?
No fix has been published for CVE-2025-55243 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-55243 being exploited?
There is no known exploitation of CVE-2025-55243 in the wild and no public exploit code.
Other vulnerabilities in Microsoft OfficePLUS
Sources
Also known as GHSA-xrfp-hm62-qxmv.