CVE-2007-0671VulnerabilityPublished 08/12/2025Updated 10/24/2026
CVE-2007-0671: Microsoft Office Excel Remote Code Execution Vulnerability
Affects Microsoft OfficeSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 08/12/2025
- KEV deadline
- 09/02/2025
- EPSS
- 43.2% chance of exploitation in 30 days – higher than 98% of CVEs
What to do
CISA 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.
Description
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.