CVE-2021-1857

MEDIUM

6.5

CVSS Score

Published: September 8, 2021 at 02:44 PM UTC

Updated: June 17, 2026 at 03:32 AM UTC

7 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

MEDIUM6.5

Exploit prediction

EPSS 1%

Description

A memory initialization issue was addressed with improved memory handling. This issue is fixed in iTunes 12.11.3 for Windows, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iCloud for Windows 12.3, macOS Big Sur 11.3, watchOS 7.4, tvOS 14.5, iOS 14.5 and iPadOS 14.5. Processing maliciously crafted web content may disclose sensitive user information.

Affected

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

iCloud · Apple

95%

v < 12.3

Affected range stops below 12.3, so it looks safe — our inference, not a vendor statement

iPadOS · Apple

95%

v < 14.5

Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 14.5

Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement

iTunes · Apple

95%

v < 12.11v < 12.11.3

Affected range stops below 12.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.11.3, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

Affected range stops below 11.3, 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

tvOS · Apple

95%

v < 14.5

Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 7.4

Affected range stops below 7.4, 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