How severe is CVE-2009-1539?

CVE-2009-1539 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-1539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 26% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1539?

CVE-2009-1539 primarily affects Microsoft Directx. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1539?

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-2009-1539 published?

CVE-2009-1539 was published on 2009-07-15 and last updated on 2026-06-16.

CVE-2009-1539

CVE-2009-1539 is a critical-severity vulnerability in Microsoft Directx with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 26% 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: 26% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Directx
Published: 2009-07-15
Last modified: 2026-06-16

Description

The QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0 through 9.0c on Windows 2000 SP4, Windows XP SP2 and SP3, and Windows Server 2003 SP2 does not properly validate unspecified size fields in QuickTime media files, which allows remote attackers to execute arbitrary code via a crafted file, aka "DirectX Size Validation Vulnerability."

Frequently asked questions

What is CVE-2009-1539?: The QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0 through 9.0c on Windows 2000 SP4, Windows XP SP2 and SP3, and Windows Server 2003 SP2 does not properly validate unspecified size fields in QuickTime media files, which allows remote attackers to execute arbitrary code via a crafted file, aka "DirectX Size Validation Vulnerability."
How severe is CVE-2009-1539?: CVE-2009-1539 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-1539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 26% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1539?: CVE-2009-1539 primarily affects Microsoft Directx. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1539?: 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-2009-1539 published?: CVE-2009-1539 was published on 2009-07-15 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:microsoft:directx:7.0:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:-:sp4:*:*:*:*:*:*
cpe:2.3:a:microsoft:directx:8.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:directx:9.0:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*

More vulnerabilities in Microsoft Directx

CVE-2012-1537 — Critical (CVSS 9.3): Heap-based buffer overflow in DirectPlay in DirectX 9.0 through 11.1 in Microsoft Windows XP SP2 and SP3, Windows…
CVE-2010-1880 — Critical (CVSS 9.3): Unspecified vulnerability in Quartz.dll for DirectShow on Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2,…
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