Is CVE-2007-0671 being actively exploited?

Yes. CVE-2007-0671 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on August 12, 2025.

What is the CVSS score for CVE-2007-0671?

CVE-2007-0671 has a CVSS 3.1 base score of 8.8 (HIGH).

CVE-2007-0671

HIGH · CVSS 8.8CISA KEV: actively exploitedEPSS 44.1%EU EUVD: exploited

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.

Key facts

CVSS score: 8.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS score: 44.1% (99th percentile)
In CISA KEV: Yes, added August 12, 2025
In EU EUVD: Yes (EUVD-2007-0668)
Published: February 3, 2007
NVD last modified: June 16, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Office Excel Remote Code Execution Vulnerability

Added to the KEV catalog on August 12, 2025; federal remediation due September 2, 2025.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2007-0668 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on January 12, 2026.

View on the EU Vulnerability Database

Affected products

microsoft / access
microsoft / access
microsoft / access
microsoft / excel
microsoft / excel
microsoft / excel
microsoft / excel viewer
microsoft / frontpage
microsoft / frontpage
microsoft / frontpage
microsoft / infopath
microsoft / office
microsoft / office
microsoft / office
microsoft / office
microsoft / onenote
microsoft / outlook
microsoft / outlook
microsoft / outlook
microsoft / powerpoint
microsoft / powerpoint
microsoft / powerpoint
microsoft / project
microsoft / project
microsoft / project
microsoft / publisher
microsoft / publisher
microsoft / publisher
microsoft / visio
microsoft / visio
microsoft / word
microsoft / word
microsoft / word
microsoft / word viewer

References

http://osvdb.org/31901(Broken Link)
http://secunia.com/advisories/24008(Broken Link, Vendor Advisory)
http://securitytracker.com/id?1017584(Broken Link)
http://vil.nai.com/vil/content/v_141393.htm(Broken Link)
http://www.avertlabs.com/research/blog/?p=191(Broken Link)
http://www.kb.cert.org/vuls/id/613740(US Government Resource)
http://www.microsoft.com/technet/security/advisory/932553.mspx(Broken Link, Vendor Advisory)
http://www.securityfocus.com/bid/22383(Broken Link)
http://www.us-cert.gov/cas/techalerts/TA07-044A.html(Broken Link, US Government Resource)
http://www.vupen.com/english/advisories/2007/0463(Vendor Advisory)
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-015(Vendor Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/32178(Third Party Advisory)
https://learn.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-015(Vendor Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A301(Broken Link)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2007-0671(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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