#VU56523 Permissions, Privileges, and Access Controls in Windows and Windows Server - CVE-2021-36967

Vulnerability identifier: #VU56523

Vulnerability risk: Medium

CVSSv4.0: 5.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-36967

CWE-ID: CWE-264

Exploitation vector: Local 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 remote attacker on the local network to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in Windows WLAN AutoConfig Service, which leads to security restrictions bypass and privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 20H2 10.0.19042.572, 10 21H1 10.0.19043.985, 10 1607 10.0.14393.10, 10 1809 10.0.17763.1, 10 1909 10.0.18363.476, 10 2004 10.0.19041.264, 10

Windows Server: 2016 10.0.14393.10, 2019 10.0.17763.1 - 2019 2004

---

External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36967

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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