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CVE-2007-0671: Microsoft Office Excel Remote Code Execution Vulnerability

criticalknown exploitedCVE-2007-0671
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Microsoft Office Excel contains a remote code execution vulnerability that can be exploited when a specially crafted Excel file is opened. This malicious file could be delivered as an email attachment or hosted on a malicious website. An attacker could leverage this vulnerability by creating a specially crafted Excel file, which, when opened, allowing an attacker to execute remote code on the affected system.

CSIRTS triage

vendor: Microsoftproduct: Office ExcelRemote code execution
What
A remote code execution vulnerability can be exploited by opening a specially crafted Excel file.
Who is affected
Users of Microsoft Office Excel.
Urgency
Remediation is urgent due to the critical nature of the vulnerability and confirmed exploitation.
Action
Apply the latest security updates for Microsoft Office Excel.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-08-12
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2007-0671

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2007-0671coverage & exploitation statusNVD · CVE.org

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