CVE-2021-31166

Microsoft HTTP Protocol Stack Remote Code Execution Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

Act

*SSVC

Descriptions

HTTP Protocol Stack Remote Code Execution Vulnerability

Una vulnerabilidad de Ejecución de Código Remota de HTTP Protocol Stack

Microsoft HTTP Protocol Stack contains a vulnerability in http.sys that allows for remote code execution.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Act

Exploitation

Active

Automatable

Yes

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2021-04-14 CVE Reserved
2021-05-11 CVE Published
2021-05-17 First Exploit
2022-04-06 Exploited in Wild
2022-04-27 KEV Due Date
2025-02-07 CVE Updated
2025-03-18 EPSS Updated

CWE

CWE-416: Use After Free

CAPEC

References (19)

URL	Tag	Source
http://packetstormsecurity.com/files/162722/Microsoft-HTTP-Protocol-Stack-Remote-Code-Execution.html	Third Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-31166
https://twitter.com/metr0/status/1392631376592076805
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-31166

URL	Date	SRC
https://packetstorm.news/files/id/180583	2024-08-31
https://packetstorm.news/files/id/162722	2021-05-20
https://github.com/0vercl0k/CVE-2021-31166	2021-05-21
https://github.com/antx-code/CVE-2021-31166	2021-11-04
https://github.com/corelight/CVE-2021-31166	2021-05-28
https://github.com/y0g3sh-99/CVE-2021-31166-Exploit	2021-07-03
https://github.com/zecopro/CVE-2021-31166	2021-05-19
https://github.com/zha0gongz1/CVE-2021-31166	2021-05-17
https://github.com/mauricelambert/CVE-2021-31166	2022-03-16
https://github.com/mvlnetdev/CVE-2021-31166-detection-rules	2022-02-26
https://github.com/imikoYa/CVE-2021-31166-exploit	2021-10-20
https://github.com/bgsilvait/WIn-CVE-2021-31166	2021-05-23
https://github.com/ZZ-SOCMAP/CVE-2021-31166	2024-09-19
https://github.com/0xmaximus/Home-Demolisher	2024-10-03

URL	Date	SRC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31166	2024-07-09

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		Windows 10 2004 Search vendor "Microsoft" for product "Windows 10 2004"				< 10.0.19041.982 Search vendor "Microsoft" for product "Windows 10 2004" and version " < 10.0.19041.982"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 10 20h2 Search vendor "Microsoft" for product "Windows 10 20h2"				< 10.0.19042.982 Search vendor "Microsoft" for product "Windows 10 20h2" and version " < 10.0.19042.982"		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2004 Search vendor "Microsoft" for product "Windows Server 2004"				< 10.0.19041.982 Search vendor "Microsoft" for product "Windows Server 2004" and version " < 10.0.19041.982"		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 20h2 Search vendor "Microsoft" for product "Windows Server 20h2"				< 10.0.19042.982 Search vendor "Microsoft" for product "Windows Server 20h2" and version " < 10.0.19042.982"		-		Affected