CVE-2021-30800

Name: CVE-2021-30800
Creator: NVD / NIST
Published: 2021-09-08T14:15:11.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2021-30800 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This issue was addressed with improved checks. This issue is fixed in iOS 14.7. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

This issue was addressed with improved checks. This issue is fixed in iOS 14.7. Joining a malicious Wi-Fi network may result in a denial of service or arbitrary code execution.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.63%

45.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apple	Iphone Os	< 14.7

References

https://support.apple.com/en-us/HT212601Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212601Release Notes, Vendor Advisory

Timeline

Published: Sep 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30800?

This issue was addressed with improved checks. This issue is fixed in iOS 14.7. Joining a malicious Wi-Fi network may result in a denial of service or arbitrary code execution.

How severe is CVE-2021-30800?

CVE-2021-30800 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30800?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30800?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST