How severe is CVE-2009-0549?

CVE-2009-0549 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-0549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0549?

CVE-2009-0549 primarily affects Microsoft Office. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0549?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2009-0549 published?

CVE-2009-0549 was published on 2009-06-10 and last updated on 2026-06-16.

CVE-2009-0549

CVE-2009-0549 is a critical-severity vulnerability in Microsoft Office with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 28% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 28% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Office
Published: 2009-06-10
Last modified: 2026-06-16

Description

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 execute arbitrary code via a crafted Excel file with a malformed record object, aka "Record Pointer Corruption Vulnerability."

Frequently asked questions

What is CVE-2009-0549?: 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 execute arbitrary code via a crafted Excel file with a malformed record object, aka "Record Pointer Corruption Vulnerability."
How severe is CVE-2009-0549?: CVE-2009-0549 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-0549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0549?: CVE-2009-0549 primarily affects Microsoft Office. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0549?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2009-0549 published?: CVE-2009-0549 was published on 2009-06-10 and last updated on 2026-06-16.

References

Affected products (16)

cpe:2.3:a:microsoft:office:2004:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:2008:*:mac:*:*:*:*:*
cpe:2.3:a:microsoft:office:xp:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_compatibility_pack_for_word_excel_ppt_2007:*:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_excel:2000:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_excel:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_excel:2007:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_excel:2007:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_excel_viewer:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_excel_viewer:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp1:x32:*:*:*:*:*
cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp1:x64:*:*:*:*:*
cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp2:x32:*:*:*:*:*
cpe:2.3:a:microsoft:office_sharepoint_server:2007:sp2:x64:*:*:*:*:*
cpe:2.3:a:microsoft:open_xml_file_format_converter:*:*:mac:*:*:*:*:*

More vulnerabilities in Microsoft Office

CVE-2007-0065 — Critical (CVSS 10.0): Heap-based buffer overflow in Object Linking and Embedding (OLE) Automation in Microsoft Windows 2000 SP4, XP SP2,…
CVE-2003-0347 — Critical (CVSS 10.0): Heap-based buffer overflow in VBE.DLL and VBE6.DLL of Microsoft Visual Basic for Applications (VBA) SDK 5.0 through 6.3…
CVE-2000-0854 — Critical (CVSS 10.0): When a Microsoft Office 2000 document is launched, the directory of that document is first used to locate DLL's such as…
CVE-2025-53766 — Critical (CVSS 9.8): Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network.
CVE-2023-23397 — Critical (CVSS 9.8): Microsoft Outlook Elevation of Privilege Vulnerability
CVE-2023-21716 — Critical (CVSS 9.8): Microsoft Word Remote Code Execution Vulnerability

All CVEs affecting Microsoft Office →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.

Browse all CWE-94 (Code Injection) vulnerabilities →