What is CVE-2025-55243?

CVE-2025-55243 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft OfficePlus Spoofing Vulnerability

Which CVE IDs does CVE-2025-55243 cover?

CVE-2025-55243 covers the following CVE IDs: CVE-2025-55243. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-55243?

CVE-2025-55243 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-55243?

CVE-2025-55243 affects 1 product, including: Microsoft OfficePLUS.

CVE-2025-55243HighCVSS 7.5

Microsoft OfficePlus Spoofing Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 3, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2025-55243 →

📋 Description

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

🎯 Affected products1

Microsoft OfficePLUS

✅ Remediation

KBRelease Notes (Security Update) — fixed build 3.10.0.26585

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55243
patchhttps://www.officeplus.cn/addin/OPCN/?source=OPCNNAVI
referencehttps://www.officeplus.cn/