#VU59392 Buffer overflow

Published: 2022-01-17 | Updated: 2022-11-22

Vulnerability identifier: #VU59392

Vulnerability risk: Critical

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-21907


Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system
Microsoft IIS
Server applications / Web servers

Vendor: Microsoft


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the HTTP Trailer Support feature in HTTP Protocol Stack (http.sys). A remote attacker can send a specially crafted HTTP request to the web server, trigger a buffer overflow and execute arbitrary code on the system.

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1809 10.0.17763.1, 10 20H2 10.0.19042.572, 10 21H1 10.0.19043.985, 11 21H2 10.0.22000.194

Windows Server: 2019 10.0.17763.1 - 2022 10.0.20348.202

Microsoft IIS: 10.0

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

Latest bulletins with this vulnerability