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Privilege escalation in Windows Malicious Software Removal Tool

Published: 2020-02-11
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-0733
Exploitation vector Local
Public exploit N/A
Vulnerable software
Windows Malicious Software Removal Tool (MSRT)
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor Microsoft

Security Advisory

This security advisory describes one low risk vulnerability.

1) Input validation error

Severity: Low

CVSSv3: 7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-0733

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No


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

The vulnerability exists due to incorrect handling of junctions in Windows Malicious Software Removal Tool (MSRT). A local user can run a specially crafted application to elevate privileges on the system.


Install updates from vendor's website.

Vulnerable software versions

Windows Malicious Software Removal Tool (MSRT): -

CPE External links

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.