Ancient Excel bug comes out of retirement for active attacks
Summary
A 17-year-old critical vulnerability in Microsoft Excel has been added to CISA's list of actively exploited vulnerabilities. This flaw, despite its age, is now being leveraged by attackers.
IFF Assessment
An old, unpatched vulnerability being actively exploited represents a significant risk to organizations that have not yet remediated it.
Severity
While the exact CVSS score is not provided, the article describes a 'critical Excel flaw' that is 'actively exploited,' suggesting a high severity with significant impact and exploitability.
Defender Context
This highlights the persistent threat posed by older, unpatched vulnerabilities, even those that have been known for many years. Defenders must maintain diligent patch management and vulnerability scanning processes to identify and address such risks before they are exploited.