How severe is CVE-2009-1536?

CVE-2009-1536 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-2009-1536 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 51% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1536?

CVE-2009-1536 primarily affects Microsoft .net Framework. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1536?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-1536 published?

CVE-2009-1536 was published on 2009-08-12 and last updated on 2026-06-16.

CVE-2009-1536

CVE-2009-1536 is a low-severity vulnerability in Microsoft .net Framework with a CVSS 2.0 base score of 2.6. Its EPSS exploit-prediction score of 51% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 51% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft .net Framework
Published: 2009-08-12
Last modified: 2026-06-16

Description

ASP.NET in Microsoft .NET Framework 2.0 SP1 and SP2 and 3.5 Gold and SP1, when ASP 2.0 is used in integrated mode on IIS 7.0, does not properly manage request scheduling, which allows remote attackers to cause a denial of service (daemon outage) via a series of crafted HTTP requests, aka "Remote Unauthenticated Denial of Service in ASP.NET Vulnerability."

Frequently asked questions

What is CVE-2009-1536?: ASP.NET in Microsoft .NET Framework 2.0 SP1 and SP2 and 3.5 Gold and SP1, when ASP 2.0 is used in integrated mode on IIS 7.0, does not properly manage request scheduling, which allows remote attackers to cause a denial of service (daemon outage) via a series of crafted HTTP requests, aka "Remote Unauthenticated Denial of Service in ASP.NET Vulnerability."
How severe is CVE-2009-1536?: CVE-2009-1536 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-2009-1536 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 51% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1536?: CVE-2009-1536 primarily affects Microsoft .net Framework. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1536?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1536 published?: CVE-2009-1536 was published on 2009-08-12 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:microsoft:.net_framework:2.0:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:2.0:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net_framework:3.5:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:-:sp1:*:*:*:*:*:*

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