What is CVE-2025-55243?

CVE-2025-55243 is a high-severity vulnerability in Microsoft Officeplus, classified under Information Disclosure. CVSS score: 7.5/10. Published 2025-09-09.

How severe is CVE-2025-55243?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Microsoft Officeplus

CVE-2025-55243

Exposure of sensitive information to an unauthorized actor in Microsoft Office Plus allows an unauthorized attacker to perform spoofing over a network.

Vulnerability class: Information Disclosure

EPSS: 0.010 (59.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Microsoft Officeplus — versions 3.0.0.0
Microsoft Officeplus

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-55243?: CVE-2025-55243 is a high-severity vulnerability in Microsoft Officeplus, classified under Information Disclosure. CVSS score: 7.5/10. Published 2025-09-09.
How severe is CVE-2025-55243?: High severity. CVSS v3 base score is 7.5 out of 10.