A denial of service exists in Microsoft IIS Server when the optional request filtering feature improperly handles requests. An attacker who successfully exploited this vulnerability could perform a temporary denial of service against pages configured to use request filtering.
To exploit this vulnerability, an attacker could send a specially crafted request to a page utilizing request filtering.
The update addresses the vulnerability by changing the way certain requests are processed by the filter.

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Advisories
Source ID Title
EUVD EUVD EUVD-2019-1676 A denial of service exists in Microsoft IIS Server when the optional request filtering feature improperly handles requests. An attacker who successfully exploited this vulnerability could perform a temporary denial of service against pages configured to use request filtering. To exploit this vulnerability, an attacker could send a specially crafted request to a page utilizing request filtering. The update addresses the vulnerability by changing the way certain requests are processed by the filter.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 20 Feb 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows 10 1507
Microsoft windows 10 1607
Microsoft windows 10 1803
Microsoft windows 10 1809
Microsoft windows Server 1803
Microsoft windows Server 1903
Microsoft windows Server 2008 R2
Microsoft windows Server 2008 Sp2
Microsoft windows Server 2012 R2
CPEs cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1803:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_1803:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1903:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
Vendors & Products Microsoft windows 10 1507
Microsoft windows 10 1607
Microsoft windows 10 1803
Microsoft windows 10 1809
Microsoft windows Server 1803
Microsoft windows Server 1903
Microsoft windows Server 2008 R2
Microsoft windows Server 2008 Sp2
Microsoft windows Server 2012 R2

Tue, 20 May 2025 18:00:00 +0000

Type Values Removed Values Added
Description A denial of service exists in Microsoft IIS Server when the optional request filtering feature improperly handles requests, aka 'Microsoft IIS Server Denial of Service Vulnerability'. A denial of service exists in Microsoft IIS Server when the optional request filtering feature improperly handles requests. An attacker who successfully exploited this vulnerability could perform a temporary denial of service against pages configured to use request filtering. To exploit this vulnerability, an attacker could send a specially crafted request to a page utilizing request filtering. The update addresses the vulnerability by changing the way certain requests are processed by the filter.
Title Microsoft IIS Server Denial of Service Vulnerability
References
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2025-05-20T17:49:32.602Z

Reserved: 2018-11-26T00:00:00.000Z

Link: CVE-2019-0941

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-06-12T14:29:01.667

Modified: 2025-05-20T18:15:30.557

Link: CVE-2019-0941

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses