How severe is CVE-2009-1546?

CVE-2009-1546 has a CVSS 2.0 base score of 8.5, rated high severity.

Is CVE-2009-1546 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1546?

CVE-2009-1546 primarily affects Microsoft Windows 2003 Server. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1546?

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

When was CVE-2009-1546 published?

CVE-2009-1546 was published on 2009-08-12 and last updated on 2026-06-16.

CVE-2009-1546

CVE-2009-1546 is a high-severity vulnerability in Microsoft Windows 2003 Server with a CVSS 2.0 base score of 8.5. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Severity: High (CVSS 2.0 base score 8.5)
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Microsoft Windows 2003 Server
Published: 2009-08-12
Last modified: 2026-06-16

Description

Integer overflow in Avifil32.dll in the Windows Media file handling functionality in Microsoft Windows allows remote attackers to execute arbitrary code on a Windows 2000 SP4 system via a crafted AVI file, or cause a denial of service on a Windows XP SP2 or SP3, Server 2003 SP2, Vista Gold, SP1, or SP2, or Server 2008 Gold or SP2 system via a crafted AVI file, aka "AVI Integer Overflow Vulnerability."

Frequently asked questions

What is CVE-2009-1546?: Integer overflow in Avifil32.dll in the Windows Media file handling functionality in Microsoft Windows allows remote attackers to execute arbitrary code on a Windows 2000 SP4 system via a crafted AVI file, or cause a denial of service on a Windows XP SP2 or SP3, Server 2003 SP2, Vista Gold, SP1, or SP2, or Server 2008 Gold or SP2 system via a crafted AVI file, aka "AVI Integer Overflow Vulnerability."
How severe is CVE-2009-1546?: CVE-2009-1546 has a CVSS 2.0 base score of 8.5, rated high severity.
Is CVE-2009-1546 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1546?: CVE-2009-1546 primarily affects Microsoft Windows 2003 Server. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1546?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-1546 published?: CVE-2009-1546 was published on 2009-08-12 and last updated on 2026-06-16.

References

Affected products (15)

cpe:2.3:o:microsoft:windows_2003_server:sp2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:sp2:*:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:sp2:*:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:-:x32:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:-:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x86:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:-:-:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:*:sp2:x64:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*

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