Vulnerability identifier: #VU26881

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-0835

CWE-ID: CWE-65

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows Defender antimalware platform
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: Microsoft

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to the Windows Defender antimalware platform improperly handles hard links. A local user can run a specially crafted application and overwrite a targeted file leading to an elevated status. 

Mitigation
Install update from vendor's website.

Vulnerable software versions

Windows Defender antimalware platform: 4.18.2001.111

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0835

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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.