Home/CVE/Microsoft Excel 2003 SP3 and 2007 SP2; Excel in Office 2007 SP2; Excel 2010 Gold and SP1; Excel in Office 2010 Gold and
CVE

CVE-2011-1989

Microsoft Excel 2003 SP3 and 2007 SP2; Excel in Office 2007 SP2; Excel 2010 Gold and SP1; Excel in Office 2010 Gold and

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.".

HIGH · CVSS 9.3 EPSS 0.58767
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules13 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

7
microsoft excelall versions
microsoft excel viewerall versions
microsoft excel web appall versions
microsoft officeall versions
microsoft office compatibility packall versions
microsoft open xml file format converterall versions
microsoft sharepoint serverall versions
◈

Sigma Hunt Rules

13
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighCode Executed Via Office Add-in XLL File
producthighPotential Persistence Via Microsoft Office Add-In
producthighPotential Persistence Via Microsoft Office Startup Folder
producthighFile With Uncommon Extension Created By An Office Application
producthighOffice Macro File Creation From Suspicious Process
▣

Scoring & Timeline

9.3
HIGH · CVSS v2 (legacy) · secure@microsoft.com
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
Published to NVD15 Sep 2011 · 12:26 PM
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.us-cert.gov/cas/techalerts/TA11-256A.htmlUS Government Resource
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
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