Remote Code Execution in Microsoft Excel
CVE-2007-0671 is a remote code execution vulnerability in Microsoft Excel 2000, Excel XP, Excel 2003, and Excel 2004 for Mac, and possibly other Microsoft Office products. The issue is described as an unspecified flaw involving improper memory access while parsing specially crafted Excel files. A remote attacker can deliver a malicious spreadsheet to a target and, if the user opens the file, trigger memory corruption that results in arbitrary code execution. The vulnerability was observed in targeted zero-day attacks and is associated with Microsoft Security Bulletin MS07-015.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in Microsoft Office Excel (CVE-2007-0671).
A remote code execution vulnerability in Microsoft Office Excel, still being exploited in the wild as of 2025.
A remote code execution vulnerability in Microsoft Office Excel, first disclosed in 2007, that was added to the CISA KEV catalog in 2025 due to evidence of exploitation.
An unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac that allows remote, user-assisted code execution, observed in zero-day attacks.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.