GHSA-5q85-2xfh-7gpf · Severity: high — The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005...
The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005 SP1 and 2008 Gold, and Visual C++ 2005 SP1 and 2008 Gold and SP1; and Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2; does not prevent VariantClear calls on an uninitialized VARIANT, which allows remote attackers to execute arbitrary code via a malformed stream to an ATL (1) component or (2) control, related to ATL headers and error handling, aka "ATL Uninitialized Object Vulnerability."
Conclusion & alert: CVE-2009-0901 is rated High Risk (72.3/100): CVSS High severity, with high exploitation likelihood (EPSS 82.53%, 99th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.36% 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.
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 | 80.17% | 82.53% | +2.36% |
| 2 | 2026-04-19 | 65.35% | 80.17% | +14.82% |
| 3 | 2026-02-14 | — | 65.35% | — |
Full EPSS history (30 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
GHSA-5q85-2xfh-7gpf · Severity: high — The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005...
: Please refer to this link http://www.microsoft.com/technet/security/Bulletin/MS09-035.mspx for mitigating factors and additional information.
| 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:*:*:*:*:*:* |