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CVE-2009-2494

53
FAUCET Score

CVE-2009-2494 is a critical remote code execution vulnerability in the Active Template Library (ATL) affecting various versions of Microsoft Windows, including 2000, XP, Server 2003, Vista, and Server 2008. This flaw stems from erroneous memory free operations that occur after specific variant handling, allowing attackers to execute arbitrary code. With a CVSS score of 9.8 (CRITICAL) and an EPSS score indicating high exploitability potential, this vulnerability poses a significant risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered substantial community discussion, suggesting awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:-:sp4:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:-:-:x32:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:-:-:x64:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
42.33%
Probability of exploitation in next 30 days
EPSS Percentile
98.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.4233 is in the 96th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blogs.technet.com / srd/archive/2009/08/11/ms09-037-why-we-are-using-cve-s-already-used-in-ms09-035.aspx
osvdb.org / 56910
docs.microsoft.com / en-us/security-updates/securitybulletins/2009/ms09-037
secunia.com / advisories/36187
Vendor Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5708
securityfocus.com / bid/35982
Patch
securitytracker.com / id
us-cert.gov / cas/techalerts/TA09-223A.html
US Government Resource
vupen.com / english/advisories/2009/2232
Vendor Advisory