CVE-2021-30762

Name: CVE-2021-30762
Creator: NVD / NIST
Published: 2021-09-08T14:15:10.3+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10Actively ExploitedEPSS 11.07%

Last modified Jun 17, 2026

CVE-2021-30762 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A use after free issue was addressed with improved memory management. This issue is fixed in iOS 12.5.4. CISA has confirmed active exploitation in the wild. EPSS estimates a 11.07% chance of exploitation in the next 30 days.

Description

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 12.5.4. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

11.07%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Nov 17, 2021.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Iphone Os	< 12.5.4

References

https://support.apple.com/en-us/HT212548Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212548Release Notes, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30762Third Party Advisory, US Government Resource

Timeline

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

Frequently Asked Questions

What is CVE-2021-30762?

How severe is CVE-2021-30762?

CVE-2021-30762 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 11.07% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-30762?

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-2021-30762?

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

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Source: NVD / NIST