CVE-2013-1305

HTTP.sys in Microsoft Windows 8, Windows Server 2012, and Windows RT allows remote attackers to cause a denial of service (infinite loop) via a crafted HTTP header, aka "HTTP.sys Denial of Service Vulnerability."

Published: 2013-05-15 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-1305 is rated Moderate Risk (62.8/100): CVSS High severity, with high exploitation likelihood (EPSS 83.17%, 99th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. 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-2013-1305

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 2025-10-18 86.26% 83.17% -3.09%
2 2025-05-01 87.36% 86.26% -1.10%
3 2025-03-30 — 87.36% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-1305

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C 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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2013-1305

Affected software / configurations for CVE-2013-1305

Vendor Product Version Raw CPE
microsoft windows_8 — cpe:2.3:o:microsoft:windows_8:-:-:x64:*:*:*:*:*
microsoft windows_8 — cpe:2.3:o:microsoft:windows_8:-:-:x86:*:*:*:*:*
microsoft windows_rt — cpe:2.3:o:microsoft:windows_rt:-:*:*:*:*:*:*:*
microsoft windows_server_2012 — cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*

References for CVE-2013-1305

cvelogic Threat Intelligence