Office Excel vulnerabilitiesAnd the versions its exploited flaws hit.
Office Excel is made by Microsoft. We track 10 published vulnerabilities listed under that exact name, across 4 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 14 April 2026. Microsoft lists newer releases under their own names, such as Office Excel Viewer, so check those pages too.
The most recent Office Excel flaw added to the known-exploited list is CVE-2009-0238, on 14 April 2026. We keep watching the known-exploited list.
Is Office Excel listed under other names? Yes.
Microsoft also lists Office Excel under more specific names, such as Office Excel Viewer. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.
Which versions of Office Excel do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
Which Office Excel vulnerabilities are being exploited?
1 flaw is on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 8.8Microsoft Office Remote Code Execution
Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a...
Which Office Excel flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 43%
Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel Viewer 2003 Gold and SP3; Excel Viewer; Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1; and Excel in Microsoft Office...
- 36%CVE-2009-1134Critical
Excel in 2007 Microsoft Office System SP1 and SP2; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allow remote attackers to...
- 31%CVE-2009-0558Critical
Array index error in Excel in Microsoft Office 2000 SP3 and Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac, allows remote attackers to execute arbitrary code via a crafted Excel file with a...
- 29%CVE-2009-0559Critical
Stack-based buffer overflow in Excel in Microsoft Office 2000 SP3 and Office XP SP3 allows remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "String Copy...
- 28%CVE-2009-0549Critical
Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; and Microsoft Office Excel Viewer 2003 SP3 allow remote attackers to...
- 25%CVE-2008-4265Critical
Microsoft Office Excel 2000 SP3 allows remote attackers to execute arbitrary code via a crafted Excel spreadsheet that contains a malformed object, which triggers memory corruption during the loading of records from...
Running Office Excel? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malformed object.
- Matched to
- Office Excel on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 10 published vulnerabilities listed under the name Office Excel, across 4 versions. The most recent Office Excel flaw added to the known-exploited list is CVE-2009-0238, on 14 April 2026.
1 is on the list of flaws known to be exploited. The most recently added is CVE-2009-0238.
Microsoft also lists Office Excel under more specific names, such as Office Excel Viewer. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.
Create a Precursor Intelligence account and track Office Excel. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.