CVE-2009-0557

CVE-2009-0557 is a high-severity (CVSS 7.8) vulnerability in Microsoft Office. CISA added it to the Known Exploited Vulnerabilities catalog on June 8, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 22, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Excel in 2007 Microsoft Office System SP1 and SP2; Open XML File Format Converter for Mac; Microsoft Office Excel Viewer 2003 SP3; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allow remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "Object Record Corruption Vulnerability."

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

• http://osvdb.org/54953
• http://www.securityfocus.com/bid/35241
• http://www.securitytracker.com/id?1022351
• http://www.us-cert.gov/cas/techalerts/TA09-160A.html
• http://www.vupen.com/english/advisories/2009/1540
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-021
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5564
• http://osvdb.org/54953