CVE-1999-1055: Microsoft Excel 97 does not warn the user before executing worksheet functions, which could allow attackers to execute a

Published n/a Updated 2026-08-21T04:30:52.711Z

Summary

Microsoft Excel 97 does not warn the user before executing worksheet functions, which could allow attackers to execute arbitrary commands by using the CALL function to execute a malicious DLL, aka the Excel "CALL Vulnerability."

Severity

UNKNOWN

Source Attribution

Source: NVD · Updated: 2026-08-21T04:30:52.711Z · Confidence: high

Impact

Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.

Affected Software

Fix

Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.

References