CVE-2021-30760

Name: CVE-2021-30760
Creator: NVD / NIST
Published: 2021-09-08T14:15:10.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.29%

Last modified Jun 17, 2026

CVE-2021-30760 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An integer overflow was addressed through improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-005 Mojave, Security Update 2021-004 Catalina. EPSS estimates a 1.29% chance of exploitation in the next 30 days.

Description

An integer overflow was addressed through improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-005 Mojave, Security Update 2021-004 Catalina. Processing a maliciously crafted font file may lead to arbitrary code execution.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

1.29%

66.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 14.7
Apple	Iphone Os	< 14.7
Apple	Mac Os X	10.14
Apple	Mac Os X	10.14.0
Apple	Mac Os X	10.14.1
Apple	Mac Os X	10.14.2
Apple	Mac Os X	10.14.3
Apple	Mac Os X	10.14.4
Apple	Mac Os X	10.14.5
Apple	Mac Os X	10.14.6
Apple	Mac Os X	10.15
Apple	Mac Os X	10.15.1
Apple	Mac Os X	10.15.2
Apple	Mac Os X	10.15.3
Apple	Mac Os X	10.15.4
Apple	Mac Os X	10.15.5
Apple	Mac Os X	10.15.6
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.5
Apple	Tvos	< 14.7
Apple	Watchos	< 7.6

References

https://support.apple.com/en-us/HT212600Vendor Advisory
https://support.apple.com/en-us/HT212601Vendor Advisory
https://support.apple.com/en-us/HT212602Vendor Advisory
https://support.apple.com/en-us/HT212603Vendor Advisory
https://support.apple.com/en-us/HT212604Vendor Advisory
https://support.apple.com/en-us/HT212605Vendor Advisory
https://support.apple.com/en-us/HT212600Vendor Advisory
https://support.apple.com/en-us/HT212601Vendor Advisory
https://support.apple.com/en-us/HT212602Vendor Advisory
https://support.apple.com/en-us/HT212603Vendor Advisory
https://support.apple.com/en-us/HT212604Vendor Advisory
https://support.apple.com/en-us/HT212605Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-30760?

How severe is CVE-2021-30760?

CVE-2021-30760 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.29% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30760?

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-2021-30760?

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

Scan your code now

Source: NVD / NIST