CVE-2021-30657 Apple macOS Unspecified

Exploited in the wild Medium 5.5 Published 8 Sep 2021 Updated 21 Oct 2025

A logic flaw in macOS allows malicious applications to bypass Gatekeeper security checks, potentially enabling unauthorized code execution.

Exploited in the wild: Since 3 Nov 2021
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-30657?

CVE-2021-30657 is a medium-severity vulnerability in Apple Mac Os X, published on 8 Sep 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. A malicious application may bypass Gatekeeper checks. Apple is aware of a report that this issue may have been actively exploited..

Weakness: CWE-862

Which versions are affected by CVE-2021-30657?

It affects 2 products.

Products include Apple Mac Os X, Apple Macos.

How do I fix CVE-2021-30657?

No fix has been published for CVE-2021-30657 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.

Is CVE-2021-30657 being exploited?

Yes. Attackers have exploited CVE-2021-30657 in the wild since at least 3 Nov 2021.

Public exploit code: 1 Metasploit module and 1 proofs of concept on GitHub.

All Apple Mac Os X vulnerabilities

Sources

Also known as GHSA-4f6h-9vp6-5p6r.