CVE-2007-0671

HIGH8.8

CISA KEV

Published 2007-02-03 · Updated 2026-06-16 · Source secure@microsoft.com

Summary

CVE-2007-0671 is a high-severity (CVSS 8.8) vulnerability in Microsoft Office. CISA added it to the Known Exploited Vulnerabilities catalog on August 12, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 2, 2025. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

Unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, allows remote user-assisted attackers to execute arbitrary code via unknown attack vectors, as demonstrated by Exploit-MSExcel.h in targeted zero-day attacks.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA Known-Exploited Vulnerability

Product: Microsoft — Office

Name: Microsoft Office Excel Remote Code Execution Vulnerability

Date added: 2025-08-12 · Due: 2025-09-02

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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