CVE-2007-0671: Microsoft Office Excel Remote Code Execution Vulnerability
What It Is — Microsoft Office Excel can execute arbitrary code when a specially‑crafted Excel file is opened. The flaw (CVE‑2007‑0671) allows an attacker to run malicious payloads on the victim’s machine.
Exploitability — Publicly disclosed; proof‑of‑concept code exists and the attack vector is a malicious attachment or web‑hosted file. CVSS v3.1 base score is 7.5 (High).
Affected Products — Microsoft Office Excel (all supported versions at the time of the advisory; legacy installations that have not been patched remain vulnerable).
Why It Matters for Trust & Control Assurance
- Vulnerability Management – Demonstrates the need for a documented, continuously‑monitored patch‑management process that can be audited.
- Evidence of Due Diligence – Maintaining verifiable records that patches were applied satisfies multiple control objectives across frameworks (e.g., NIST CSF Identify, ISO 27001 A.12.6).
- Defensible Audit Trail – If a breach occurs, proof that the organization had an up‑to‑date remediation workflow can mitigate liability and support regulatory inquiries.
Recommended Actions
- Verify that all Excel installations are patched to the latest security update released by Microsoft.
- Disable or restrict macro execution for files originating from untrusted sources.
- Deploy email and web gateway scanning to block malicious Excel attachments.
- Record patch‑deployment status in a centralized control‑mapping repository to provide audit‑ready evidence.
Source: CISA KEV – CVE‑2007‑0671