CVE-2011-0097
Integer underflow in Microsoft Excel 2002 SP3, 2003 SP3, 2007 SP2, and 2010; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Excel Viewer SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 31.6%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Integer underflow in Microsoft Excel 2002 SP3, 2003 SP3, 2007 SP2, and 2010; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Excel Viewer SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2 allows remote attackers to execute arbitrary code via a crafted 400h substream in an Excel file, which triggers a stack-based buffer overflow, aka "Excel Integer Overrun Vulnerability."
- CVSS 2.0
- 9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
- EPSS
- 31.55% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-189
- Affected
- microsoft/excel · microsoft/excel viewer · microsoft/office · microsoft/office compatibility pack · microsoft/open xml file format converter
- Source
- secure@microsoft.com
EPSS moved from 31.6% on 24 September 2026 to 31.6% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://osvdb.org/71758
- http://secunia.com/advisories/39122Vendor Advisory
- http://secunia.com/secunia_research/2011-31Vendor Advisory
- http://www.securityfocus.com/bid/47201
- http://www.securitytracker.com/id?1025337
- http://www.us-cert.gov/cas/techalerts/TA11-102A.htmlUS Government Resource
- http://www.vupen.com/english/advisories/2011/0940Vendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-021
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12612
- http://osvdb.org/71758
- http://secunia.com/advisories/39122Vendor Advisory
- http://secunia.com/secunia_research/2011-31Vendor Advisory
- http://www.securityfocus.com/bid/47201
- http://www.securitytracker.com/id?1025337
- http://www.us-cert.gov/cas/techalerts/TA11-102A.htmlUS Government Resource
- http://www.vupen.com/english/advisories/2011/0940Vendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-021
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12612
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.