CVE-2000-0637: Microsoft Excel

Medium severity, CVSS 4.6. EPSS: 2.4% chance of exploitation in the next 30 days.

Microsoft Excel 97 and 2000 allows an attacker to execute arbitrary commands by specifying a malicious .dll using the Register.ID function, aka the "Excel REGISTER.ID Function" vulnerability.

Affected products

• Microsoft Excel: version 97 only; version 2000 only

Published 2000-07-26. Last modified 2026-06-16.