Vulnerability identifier: #VU53104

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-31205

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a local attacker to bypass authentication process.

The vulnerability exists due to security feature bypass issue in Windows SMB Client. A remote attacker can gain access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 20H2 - 10 2004

Windows Server: 2019 20H2 - 2019 2004

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31205

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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?

No. We are not aware of malware exploiting this vulnerability.