CVE-2022-26766

Name: CVE-2022-26766
Creator: NVD / NIST
Published: 2022-05-26T20:15:09.69+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 2.66%

Last modified Jun 17, 2026

CVE-2022-26766 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A certificate parsing issue was addressed with improved checks. This issue is fixed in tvOS 15.5, iOS 15.5 and iPadOS 15.5, Security Update 2022-004 Catalina, watchOS 8.6, macOS Big Sur 11.6.6, macOS Monterey 12.4. EPSS estimates a 2.66% chance of exploitation in the next 30 days.

Description

A certificate parsing issue was addressed with improved checks. This issue is fixed in tvOS 15.5, iOS 15.5 and iPadOS 15.5, Security Update 2022-004 Catalina, watchOS 8.6, macOS Big Sur 11.6.6, macOS Monterey 12.4. A malicious app may be able to bypass signature validation.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

2.66%

83.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 15.5
Apple	Iphone Os	< 15.5
Apple	Mac Os X	< 10.15.7
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.6.6
Apple	Macos	>= 12.0, < 12.4
Apple	Tvos	< 15.5
Apple	Watchos	< 8.6

References

https://support.apple.com/en-us/HT213253Vendor Advisory
https://support.apple.com/en-us/HT213254Vendor Advisory
https://support.apple.com/en-us/HT213255Vendor Advisory
https://support.apple.com/en-us/HT213256Vendor Advisory
https://support.apple.com/en-us/HT213257Vendor Advisory
https://support.apple.com/en-us/HT213258Vendor Advisory
https://support.apple.com/en-us/HT213253Vendor Advisory
https://support.apple.com/en-us/HT213254Vendor Advisory
https://support.apple.com/en-us/HT213255Vendor Advisory
https://support.apple.com/en-us/HT213256Vendor Advisory
https://support.apple.com/en-us/HT213257Vendor Advisory
https://support.apple.com/en-us/HT213258Vendor Advisory

Timeline

Published: May 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-26766?

How severe is CVE-2022-26766?

CVE-2022-26766 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 2.66% probability of exploitation in the next 30 days.

How do I fix CVE-2022-26766?

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-2022-26766?

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

Scan your code now

Source: NVD / NIST