How severe is CVE-2009-0084?

CVE-2009-0084 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-0084 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0084?

CVE-2009-0084 primarily affects Microsoft Directx. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0084?

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-2009-0084 published?

CVE-2009-0084 was published on 2009-04-15 and last updated on 2026-06-16.

CVE-2009-0084

CVE-2009-0084 is a critical-severity vulnerability in Microsoft Directx with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 32% 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: 32% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Directx
Published: 2009-04-15
Last modified: 2026-06-16

Description

Use-after-free vulnerability in DirectShow in Microsoft DirectX 8.1 and 9.0 allows remote attackers to execute arbitrary code via an MJPEG file or video stream with a malformed Huffman table, which triggers an exception that frees heap memory that is later accessed, aka "MJPEG Decompression Vulnerability."

Frequently asked questions

What is CVE-2009-0084?: Use-after-free vulnerability in DirectShow in Microsoft DirectX 8.1 and 9.0 allows remote attackers to execute arbitrary code via an MJPEG file or video stream with a malformed Huffman table, which triggers an exception that frees heap memory that is later accessed, aka "MJPEG Decompression Vulnerability."
How severe is CVE-2009-0084?: CVE-2009-0084 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-0084 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0084?: CVE-2009-0084 primarily affects Microsoft Directx. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0084?: 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-2009-0084 published?: CVE-2009-0084 was published on 2009-04-15 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:microsoft:directx:8.1:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:directx:9.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:directx:9.0a:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:directx:9.0b:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:directx:9.0c:*:*:*:*:*:*:*

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,…
CVE-2010-1879 — Critical (CVSS 9.3): Unspecified vulnerability in Quartz.dll for DirectShow; Windows Media Format Runtime 9, 9.5, and 11; Media Encoder 9;…
CVE-2009-1539 — Critical (CVSS 9.3): The QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0 through 9.0c on Windows 2000…
CVE-2009-1538 — Critical (CVSS 9.3): The QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0 through 9.0c on Windows 2000…
CVE-2008-0011 — Critical (CVSS 9.3): Microsoft DirectX 8.1 through 9.0c, and DirectX on Microsoft XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and…

All CVEs affecting Microsoft Directx →

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 →