Microsoft Office Excel Remote Code Execution Vulnerability (CVE-2007-0671)
Severity: high · Patch status: unknown · Since 2025-08-12 · CVE-2007-0671
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 added CVE-2007-0671 to its Known Exploited Vulnerabilities catalog on Aug 12, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Sep 2, 2025 (BOD 22-01); treat that as the outer limit.
Sources
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