#VU72220 Security features bypass in Windows Defender - CVE-2023-21809

Vulnerability identifier: #VU72220

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-21809

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

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

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to unspecified error. A remote attacker can create a specially crafted malicious file that may bypass antimalware protection.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows Defender: All versions

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External links
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21809

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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.