CVE-2009-2495

The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005 SP1 and 2008 Gold and SP1, and Visual C++ 2005 SP1 and 2008 Gold and SP1 does not properly enforce string termination, which allows remote attackers to obtain sensitive information via a crafted HTML document with an ATL (1) component or (2) control that triggers a buffer over-read, related to ATL headers and buffer allocation, aka "ATL Null String Vulnerability."

Published: 2009-07-29 Last update: 2026-05-27 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2009-2495

EPSS CVSS CWE GHSA Affected

Conclusion & alert: CVE-2009-2495 is rated Moderate Risk (63.3/100): CVSS Medium severity, with high exploitation likelihood (EPSS 68.42%, 99th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.77% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-2495

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-28	65.65%	68.42%	+2.77%
2	2026-04-19	45.67%	65.65%	+19.98%
3	2026-02-14	—	45.67%	—

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-2495

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	2.8	3.6	134c704f-9b21-4f2e-91b3-4a467353bcc0
7.8	2.0	HIGH	`AV:N/AC:L/Au:N/C:C/I:N/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:C) Complete confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	10.0	6.9	[email protected]

Weakness enumeration for CVE-2009-2495

CWE-126 MITRE ↗ CWE-200 MITRE ↗

GitHub Security Advisory for CVE-2009-2495

GHSA-w98q-7wf3-vg43 · Severity: high — The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005...

Affected software / configurations for CVE-2009-2495

Vendor	Product	Version	Raw CPE
microsoft	visual_c\+\+	2005	cpe:2.3:a:microsoft:visual_c\+\+:2005:sp1_redistribution_pkg::::::
microsoft	visual_c\+\+	2008	cpe:2.3:a:microsoft:visual_c\+\+:2008:redistribution_pkg::::::
microsoft	visual_c\+\+	2008	cpe:2.3:a:microsoft:visual_c\+\+:2008:sp1_redistribution_pkg::::::
microsoft	visual_studio	2005	cpe:2.3:a:microsoft:visual_studio:2005:sp1::::::
microsoft	visual_studio	2005	cpe:2.3:a:microsoft:visual_studio:2005:sp1:64_bit_hosted_visual_c\+\+_tools:::::*
microsoft	visual_studio	2008	cpe:2.3:a:microsoft:visual_studio:2008:::::::*
microsoft	visual_studio	2008	cpe:2.3:a:microsoft:visual_studio:2008:sp1::::::
microsoft	visual_studio_.net	2003	cpe:2.3:a:microsoft:visual_studio_.net:2003:sp1::::::

References for CVE-2009-2495

URL	Tags
http://marc.info/?l=bugtraq&m=126592505426855&w=2
http://secunia.com/advisories/35967
http://secunia.com/advisories/36374
http://secunia.com/advisories/36746
http://sunsolve.sun.com/search/document.do?assetkey=1-66-266108-1
http://www.adobe.com/support/security/bulletins/apsb09-10.html
http://www.adobe.com/support/security/bulletins/apsb09-13.html
http://www.novell.com/support/viewContent.do?externalId=7004997&sliceId=1
http://www.us-cert.gov/cas/techalerts/TA09-195A.html	US Government Resource
http://www.us-cert.gov/cas/techalerts/TA09-286A.html	US Government Resource
http://www.vupen.com/english/advisories/2009/2034
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-035
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-060
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6305
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6478
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7573

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