Office Excel Viewer vulnerabilitiesAnd the versions its exploited flaws hit.
Office Excel Viewer is made by Microsoft. We track 29 published vulnerabilities in it, across 1 version. 2 of them are on the list of flaws known to be exploited, the newest added on 14 April 2026. If you run Office Excel Viewer, check your version against the exploited flaws below and patch those first.
The most recent Office Excel Viewer flaw added to the known-exploited list is CVE-2009-0238, on 14 April 2026. We keep watching the known-exploited list.
Which versions of Office Excel Viewer do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
- CVE-2009-0238Exploited list, 14 Apr 2026
Microsoft Office Remote Code Execution
all versions2003-sp3 - CVE-2009-0557Exploited list, 8 Jun 2022
Microsoft Office Object Record Corruption Vulnerability
2003-sp3
Which Office Excel Viewer vulnerabilities are being exploited?
2 flaws are 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...
- 7.8Microsoft Office Object Record Corruption Vulnerability
Microsoft Office contains an object record corruption vulnerability that allows remote attackers to execute code via a crafted Excel file with a malformed record object.
Which Office Excel Viewer 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...
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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 Viewer 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 29 published vulnerabilities listed under the name Office Excel Viewer, across 1 version. The most recent Office Excel Viewer flaw added to the known-exploited list is CVE-2009-0238, on 14 April 2026.
2 are on the list of flaws known to be exploited. The most recently added are CVE-2009-0238 and CVE-2009-0557.
Each flaw names its own versions, usually as ranges. The newest, CVE-2009-0238, affects all versions, 2003-sp3. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Office Excel Viewer. 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.