CVE-2007-0671
Published: August 12, 2025
Official 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.
CISA KEV Advisory
Microsoft Office Excel Remote Code Execution Vulnerability
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This remote code execution vulnerability in Microsoft Office Excel can be exploited by opening a specially crafted Excel file. With an EPSS score of 0.69189 and confirmed exploitation in CISA's KEV, this flaw poses a significant and urgent risk of an attacker executing arbitrary code on affected systems.
This vulnerability is actively exploited in the wild. It is remotely exploitable, typically through email attachments or malicious websites hosting the crafted Excel file.
Users should ensure Microsoft Office Excel is updated to the latest secure version. Exercise extreme caution when opening Excel files from untrusted sources and implement email filtering to block suspicious attachments.
Technical Analysis
CVE-2007-0671 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2007-0671 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2007-0671 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1