CVE-2021-30657

5.5 MEDIUM 69% exploit odds exploited in the wild Fix listed Auth & access OS & kernel

What it is

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..

At a glance

Exploitability: Can be exploited locally on the machine without logging in, but needs a user to act. High risk of data tampering.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-04-13 00:00 UTC ReservedThe CVE id was reserved by its CNA
2021-09-08 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2021-11-03 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2021-11-17 Remediation deadlineCISA's due date for federal agencies to fix it
2026-06-17 03:50 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 68.5% in the next 30 days (EPSS).
Severity: 5.5 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-09-08 15:15 UTC
Last modified: 2026-06-17 03:50 UTC
Added to CISA KEV: 2021-11-03
Exploit probability: 68.5% · EPSS, next 30 days
Weakness: CWE-862 · Missing authorization
Record status: Analyzed

Affected

Apple Mac Os X ≤ 10.15.5
Apple Mac Os X 10.15.6
Apple Mac Os X 10.15.7
Apple macOS < 11.3

Attack profile CVSS 3.1 · 5.5

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Raw vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-30657.md and follow it. Check whether this project is affected by CVE-2021-30657. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record