How severe is CVE-2014-3523?

CVE-2014-3523 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2014-3523 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-3523?

CVE-2014-3523 primarily affects Apache Http Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-3523?

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

When was CVE-2014-3523 published?

CVE-2014-3523 was published on 2014-07-20 and last updated on 2026-06-17.

CVE-2014-3523

CVE-2014-3523 is a medium-severity vulnerability in Apache Http Server with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 16% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 16% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Apache Http Server
Published: 2014-07-20
Last modified: 2026-06-17

Description

Memory leak in the winnt_accept function in server/mpm/winnt/child.c in the WinNT MPM in the Apache HTTP Server 2.4.x before 2.4.10 on Windows, when the default AcceptFilter is enabled, allows remote attackers to cause a denial of service (memory consumption) via crafted requests.

Frequently asked questions

What is CVE-2014-3523?: Memory leak in the winnt_accept function in server/mpm/winnt/child.c in the WinNT MPM in the Apache HTTP Server 2.4.x before 2.4.10 on Windows, when the default AcceptFilter is enabled, allows remote attackers to cause a denial of service (memory consumption) via crafted requests.
How severe is CVE-2014-3523?: CVE-2014-3523 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2014-3523 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-3523?: CVE-2014-3523 primarily affects Apache Http Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-3523?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-3523 published?: CVE-2014-3523 was published on 2014-07-20 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*

More vulnerabilities in Apache Http Server

CVE-2010-0425 — Critical (CVSS 10.0): modules/arch/win32/mod_isapi.c in mod_isapi in the Apache HTTP Server 2.0.37 through 2.0.63, 2.2.0 through 2.2.14, and…
CVE-2005-2700 — Critical (CVSS 10.0): ssl_engine_kernel.c in mod_ssl before 2.8.24, when using "SSLVerifyClient optional" in the global virtual host…
CVE-2004-0492 — Critical (CVSS 10.0): Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a…
CVE-2003-0789 — Critical (CVSS 10.0): mod_cgid in Apache before 2.0.48, when using a threaded MPM, does not properly handle CGI redirect paths, which could…
CVE-1999-1293 — Critical (CVSS 10.0): mod_proxy in Apache 1.2.5 and earlier allows remote attackers to cause a denial of service via malformed FTP commands,…
CVE-1999-0926 — Critical (CVSS 10.0): Apache allows remote attackers to conduct a denial of service via a large number of MIME headers.

All CVEs affecting Apache Http Server →

Other CWE-399 (Resource Management Errors) vulnerabilities

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

Browse all CWE-399 (Resource Management Errors) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

45.84.120.3 (ipv4-addr)
45.232.73.84 (ipv4-addr)
41.205.23.59 (ipv4-addr)
203.192.232.180 (ipv4-addr)
189.15.10.179 (ipv4-addr)
187.110.238.50 (ipv4-addr)
177.53.215.134 (ipv4-addr)
151.80.141.196 (ipv4-addr)