CVE-2008-0081: Microsoft Excel macro validation flaw allows remote code execution

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 19 September 2026. Confidence: medium.

high priorityCritical CVSS score and very high EPSS percentile, but exploitation requires user interaction and the affected products are long out of support.

What it is

CVE-2008-0081 is an unspecified macro validation vulnerability in Microsoft Excel 2000 SP3 through 2003 SP2, Excel Viewer 2003, and Office 2004 for Mac. A crafted file containing malicious macros can execute arbitrary code when the victim opens it, and the record notes it is distinct from CVE-2007-3490. The description is thin on the exact validation failure, but the impact is full code execution in the context of the user.

Impact

An attacker who gets a victim to open a crafted Excel document can run arbitrary code with the victim's privileges, enabling malware installation, data theft, or further lateral movement.

Attack surface

Reached remotely by delivering a malicious Excel file that the user must open; the description calls it user-assisted, so user interaction is required despite the CVSS 3.1 vector showing UI:N. No authentication is needed to craft or send the file.

Exploitation

Not listed in CISA KEV and no ransomware usage is documented, but EPSS is high at 0.579 (99th percentile), indicating elevated predicted exploitation activity. References are mostly vendor advisories and patch links, with no public exploit tag.

What to do

• Apply Microsoft security bulletin MS08-014, which patches this vulnerability, to Excel 2000 SP3, Excel 2003 SP2, Excel Viewer 2003, and Office 2004 for Mac.
• Block or strip macros in Excel documents at email and web gateways where business use allows.
• Disable or restrict macro execution via Office Trust Center and Group Policy for legacy Office installs.
• Retire or isolate unsupported Excel 2000 and Office 2004 for Mac systems that cannot be patched.
• Warn users not to open unexpected Excel attachments or downloads from untrusted sources.

Detection

• Monitor for Excel processes (EXCEL.EXE) spawning child processes such as cmd.exe, powershell.exe, or wscript.exe.
• Alert on Office applications loading macro-enabled files from email attachment or download directories.
• Review endpoint logs for suspicious file writes or network connections originating from Excel.
• Search for known malicious macro patterns or Office document hashes tied to this vulnerability in EDR and email telemetry.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.