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CVE-2009-2525

35
FAUCET Score

CVE-2009-2525 is a critical heap corruption vulnerability affecting Microsoft Windows Media Runtime components, including DirectShow WMA Voice Codec and Audio Compression Manager, present in various Windows operating systems from 2000 to Server 2008 and Vista. This flaw allows remote attackers to execute arbitrary code by tricking a user into opening a crafted media file or accessing malicious streaming content. With a CVSS score of 9.3 (critical), the vulnerability is easily exploitable over the network with medium attack complexity, leading to complete compromise of confidentiality, integrity, and availability. While the EPSS and FAUCET scores indicate a high potential risk, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this decade-old vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:a:microsoft:windows_media_format_runtime:9.0:*:*:*:*:*:*:*
9CPE matchmatch criteria
cpe:2.3:a:microsoft:windows_media_player:9:*:*:*:*:*:*:*
9.5CPE matchmatch criteria
cpe:2.3:a:microsoft:windows_media_format_runtime:9.5:*:*:*:*:*:*:*
11CPE matchmatch criteria
cpe:2.3:a:microsoft:windows_media_format_runtime:11:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
23.32%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.2332 is in the 89th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2009/ms09-051
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6484
us-cert.gov / cas/techalerts/TA09-286A.html
US Government Resource