What’s Vulnerable › Vulnerabilities

CVE-2022-26766

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-26 · updated 2026-06-17
• Weakness: CWE-295

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.

Affected products

• Apple iPadOS: before 15.5 — fixed in 15.5
• Apple Iphone Os: before 15.5 — fixed in 15.5
• macOS: before 10.15.7; 10.15.7, 10.15.7-security_update_2020-001, 10.15.7-security_update_2021-001, 10.15.7-security_update_2021-002, 10.15.7-security_update_2021-003, 10.15.7-security_update_2021-004 (+7) — fixed in 10.15.7
• Apple macOS: from 11.0 before 11.6.6; from 12.0 before 12.4 — fixed in 11.6.6, 12.4
• Apple tvOS: before 15.5 — fixed in 15.5
• Apple watchOS: before 8.6 — fixed in 8.6

How to fix

Upgrade to a fixed version: Apple iPadOS 15.5; Apple Iphone Os 15.5; macOS 10.15.7; Apple macOS 11.6.6, 12.4; Apple tvOS 15.5; Apple watchOS 8.6. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT213253
• https://support.apple.com/en-us/HT213254
• https://support.apple.com/en-us/HT213255
• https://support.apple.com/en-us/HT213256
• https://support.apple.com/en-us/HT213257
• https://support.apple.com/en-us/HT213258
• https://support.apple.com/en-us/HT213253
• https://support.apple.com/en-us/HT213254
• https://support.apple.com/en-us/HT213255
• https://support.apple.com/en-us/HT213256
• https://support.apple.com/en-us/HT213257
• https://support.apple.com/en-us/HT213258

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