CVE-2020-9876

HIGH

7.8

CVSS Score

Published: October 22, 2020 at 05:58 PM UTC

Updated: June 17, 2026 at 03:28 AM UTC

7 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

HIGH7.8

Exploit prediction

EPSS 2%

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8, iTunes 12.10.8 for Windows, iCloud for Windows 11.3, iCloud for Windows 7.20. Opening a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution.

Affected

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

iCloud · Apple

95%

v < 7.20v < iCloud for Windows 11.3v < iCloud for Windows 7.2010.0 ≤ v < 11.5

Affected range stops below 11.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.20, so it looks safe — our inference, not a vendor statement

Affected range stops below iCloud for Windows 11.3, so it looks safe — our inference, not a vendor statement

Affected range stops below iCloud for Windows 7.20, so it looks safe — our inference, not a vendor statement

iPadOS · Apple

95%

v < 14.0

Affected range stops below 14.0, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 14.0v < iOS 13.6 and iPadOS 13.6

Affected range stops below 14.0, so it looks safe — our inference, not a vendor statement

Affected range stops below iOS 13.6 and iPadOS 13.6, so it looks safe — our inference, not a vendor statement

iTunes · Apple

95%

v < 12.10.9v < iTunes 12.10.8 for Windows

Affected range stops below 12.10.9, so it looks safe — our inference, not a vendor statement

Affected range stops below iTunes 12.10.8 for Windows, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

Affected range stops below 10.13.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.14.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 10.15.6, so it looks safe — our inference, not a vendor statement

Affected range stops below macOS Catalina 10.15.6, so it looks safe — our inference, not a vendor statement

tvOS · Apple

95%

v < 14.0v < tvOS 13.4.8

Affected range stops below 14.0, so it looks safe — our inference, not a vendor statement

Affected range stops below tvOS 13.4.8, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 7.0v < watchOS 6.2.8

Affected range stops below 7.0, so it looks safe — our inference, not a vendor statement

Affected range stops below watchOS 6.2.8, 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

References (17)

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/Dec/32

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/Nov/19

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/Nov/20

Mailing Listx_refsource_FULLDISCThird Party Advisory

Source: [email protected]

http://seclists.org/fulldisclosure/2020/Nov/22

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/kb/HT211288

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/kb/HT211289

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/kb/HT211290

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/kb/HT211291

CVSS

7.8HIGH[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-787

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