What’s Vulnerable › Vulnerabilities

CVE-2011-1989

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 27.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-09-15 · updated 2026-06-16
• Weakness: CWE-20

Description

Microsoft Excel 2003 SP3 and 2007 SP2; Excel in Office 2007 SP2; Excel 2010 Gold and SP1; Excel in Office 2010 Gold and SP1; Office 2004, 2008, and 2011 for Mac; Open XML File Format Converter for Mac; Excel Viewer SP2; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2; Excel Services on Office SharePoint Server 2007 SP2; Excel Services on Office SharePoint Server 2010 Gold and SP1; and Excel Web App 2010 Gold and SP1 do not properly parse conditional expressions associated with formatting requirements, which allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Conditional Expression Parsing Vulnerability."

Affected products

• Microsoft Excel 2013 Service Pack 1: 2003-sp3, 2007-sp2, 2010, 2010-sp1
• Microsoft Excel Viewer: all versions
• Microsoft Excel Web App: 2010, 2010-sp1
• Microsoft Office: 2004, 2007-sp2, 2008, 2010, 2010-sp1, 2011
• Microsoft Office Compatibility Pack: 2007-sp2
• Microsoft Open Xml File Format Converter: all versions
• Microsoft SharePoint Server: 2007-sp2, 2010, 2010-sp1

References

• http://www.us-cert.gov/cas/techalerts/TA11-256A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-072
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12974
• http://www.us-cert.gov/cas/techalerts/TA11-256A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-072
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12974

Get alerted when CVE-2011-1989 or the next vulnerability affects your stack