Vulnerability identifier: #VU59472

Vulnerability risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-21838

CWE-ID: CWE-59

Exploitation vector: Local

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 user to escalate privileges on the system.

The vulnerability exists due to a link following issue within the SilentCleanup scheduled task. A local user can create a specially symbolic crafted link to critical folders on the system and force the task to delete the folder.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 - 10 S, 7, 8.1 - 8.1 RT, 11 21H2

Windows Server: 2008 R2 - 2022

---

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21838
http://www.zerodayinitiative.com/advisories/ZDI-22-049/

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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