Cyber Resilience

CVE-2022-26766

Medium

Published: 26 May 2022

Published
26 May 2022
Modified
30 May 2025
KEV Added
—
Patch
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CVSS Score v3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS Score 0.0172 82.8th percentile
Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-26766 is a medium-severity Improper Certificate Validation (CWE-295) vulnerability in Apple Mac Os X. Its CVSS base score is 5.5 (Medium).

Operationally, ranked in the top 17.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

to bypass signature validation.

CWE(s)
CWE-295

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

apple
ipados
≤ 15.5
apple
iphone os
≤ 15.5
apple
mac os x
10.15.7 · ≤ 10.15.7
apple
macos
11.0 — 11.6.6 · 12.0 — 12.4
apple
tvos
≤ 15.5
apple
watchos
≤ 8.6

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SA-19 Component Authenticity
addresses: CWE-295

When certificates are used to establish component provenance, the control requires correct certificate validation procedures.

SC-17 Public Key Infrastructure Certificates
addresses: CWE-295

Mandates approved trust anchors and issuance policies, directly preventing acceptance of unvalidated or untrusted certificates.

SC-45 System Time Synchronization
addresses: CWE-295

Correct system time is required for proper enforcement of certificate notBefore/notAfter dates and time-based revocation checks.

References