CVE-2021-30737

HIGH

8.8

CVSS Score

Published: September 8, 2021 at 01:43 PM UTC

Updated: June 17, 2026 at 03:50 AM UTC

5 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

HIGH8.8

Exploit prediction

EPSS 1%

Description

A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code. This issue is fixed in tvOS 14.6, Security Update 2021-004 Mojave, iOS 14.6 and iPadOS 14.6, iOS 12.5.4, Security Update 2021-003 Catalina, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted certificate may lead to arbitrary code execution.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 14.6

Affected range stops below 14.6, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 12.5.413.0 ≤ v < 14.6

Affected range stops below 12.5.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.6, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

Affected range stops below 11.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 2021, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.5, so it looks safe — our inference, not a vendor statement

tvOS · Apple

95%

v < 14.6

Affected range stops below 14.6, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 7.5

Affected range stops below 7.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references