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    CVE-2003-0821

    Microsoft Excel 97, 2000, and 2002 allows remote attackers to execute arbitrary code via a spreadsheet with a malicious XLM (Excel 4) macro that bypasses the macro security model.

    Published:Nov 18, 2003
    Last Modified:Apr 16, 2026
    EPS:Nov 18, 2003
    EPSS Score:0.10981
    CVSS Score:7.5

    Affected Products

    Vendor
    Microsoft
    Product
    Word
    Vendor
    Microsoft
    Product
    Works

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-83949 (CVSS 5.5) — Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.…
    CVE-2026-83951 (CVSS 5.5) — Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.…
    CVE-2026-80090 (CVSS 6.5) — Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a net…
    CVE-2026-80085 (CVSS 8.8) — Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a net…
    CVE-2026-80080 (CVSS 8.8) — Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.…
    CVE-2026-78525 (CVSS 8.8) — Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.…
    CVE-2026-78520 (CVSS 6.5) — Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.…
    CVE-2026-78522 (CVSS 6.5) — Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a net…
    CVE-2026-78521 (CVSS 8.8) — Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a net…
    CVE-2026-80079 (CVSS 6.5) — Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a net…

    References

    http://www.securityfocus.com/bid/9010
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-050
    https://exchange.xforce.ibmcloud.com/vulnerabilities/13681
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A636
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A675
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A695
    http://www.securityfocus.com/bid/9010
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-050
    https://exchange.xforce.ibmcloud.com/vulnerabilities/13681
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A636
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A675
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A695

    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