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18-year-old Excel bug still used in attacks, warning for legacy Office users

A Microsoft Excel security flaw first reported 18 years ago is still being exploited in real-world attacks, highlighting risks for organisations running unsupported software. The U.S. Cybersecurity and Infrastructure Security Agency added CVE-2009-0238 to its catalogue of known exploited vulnerabilities and told U.S. federal civilian agencies to complete mitigation by April 28. The bug affects older Excel and Office components, while newer Excel versions are not affected.