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    CVE-2009-0238

    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 2004 and 2008 for Mac allow remote attackers to execute arbitrary code via a crafted Excel document that triggers an access attempt on an invalid object, as exploited in the wild in February 2009 by Trojan.Mdropper.AC.

    Published:Feb 25, 2009
    Last Modified:Apr 22, 2026
    EPS:Feb 25, 2009
    EPSS Score:0.81142
    CVSS Score:8.8

    CISA Notification

    Description

    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 2004 and 2008 for Mac allow remote attackers to execute arbitrary code via a crafted Excel document that triggers an access attempt on an invalid object, as exploited in the wild in February 2009 by Trojan.Mdropper.AC.

    Required Action:

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Notes:

    No extra notes provided.

    Due Date
    Apr 28, 2026
    136 days ago
    Alert Date
    Apr 14, 2026
    150 days ago

    Affected Products

    Vendor
    Microsoft
    Product
    Excel
    Vendor
    Microsoft
    Product
    Excel Viewer
    Vendor
    Microsoft
    Product
    Office
    Vendor
    Microsoft
    Product
    Office Compatibility Pack
    Vendor
    Microsoft
    Product
    Office Excel Viewer

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-85875 (CVSS 5.5) — Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.…
    CVE-2026-81948 (CVSS 7.8) — Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81950 (CVSS 7.8) — Double free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81949 (CVSS 7.8) — Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code local…
    CVE-2026-81953 (CVSS 7.8) — Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81959 (CVSS 7.8) — Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81951 (CVSS 7.8) — Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81388 (CVSS 7.8) — Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81957 (CVSS 7.8) — Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81395 (CVSS 5.5) — Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.…

    References

    http://blogs.zdnet.com/security/?p=2658
    http://isc.sans.org/diary.html?storyid=5923
    http://securitytracker.com/id?1021744
    http://www.microsoft.com/technet/security/advisory/968272.mspx
    http://www.securityfocus.com/bid/33870
    http://www.symantec.com/business/security_response/writeup.jsp?docid=2009-022310-4202-99
    http://www.us-cert.gov/cas/techalerts/TA09-104A.html
    http://www.vupen.com/english/advisories/2009/1023
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009
    https://exchange.xforce.ibmcloud.com/vulnerabilities/48875
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5968
    http://blogs.zdnet.com/security/?p=2658
    http://isc.sans.org/diary.html?storyid=5923
    http://securitytracker.com/id?1021744
    http://www.microsoft.com/technet/security/advisory/968272.mspx
    http://www.securityfocus.com/bid/33870
    http://www.symantec.com/business/security_response/writeup.jsp?docid=2009-022310-4202-99
    http://www.us-cert.gov/cas/techalerts/TA09-104A.html
    http://www.vupen.com/english/advisories/2009/1023
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009
    https://exchange.xforce.ibmcloud.com/vulnerabilities/48875
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5968
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-0238

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High