CVE-2019-8657

HIGH
8.8
CVSS Score
Published: December 18, 2019 at 05:33 PM UTC
Updated: June 17, 2026 at 02:42 AM UTC
4 products affected across 1 vendormacOSiPhone OStvOS

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. Parsing a maliciously crafted office document 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.

v < 12.4v < iOS 12.4
Affected range stops below 12.4, so it looks safe — our inference, not a vendor statement
Affected range stops below iOS 12.4, so it looks safe — our inference, not a vendor statement
v < 10.14.6v < macOS Mojave 10.14.6
Affected range stops below 10.14.6, so it looks safe — our inference, not a vendor statement
Affected range stops below macOS Mojave 10.14.6, so it looks safe — our inference, not a vendor statement
v < 12.4v < tvOS 12.4
Affected range stops below 12.4, so it looks safe — our inference, not a vendor statement
Affected range stops below tvOS 12.4, so it looks safe — our inference, not a vendor statement
v < 5.3v < watchOS 5.3
Affected range stops below 5.3, so it looks safe — our inference, not a vendor statement
Affected range stops below watchOS 5.3, 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:

References (4)

x_refsource_MISCVendor Advisory
https://support.apple.com/HT210346
x_refsource_MISCVendor Advisory
https://support.apple.com/HT210348
x_refsource_MISCVendor Advisory
https://support.apple.com/HT210351
x_refsource_MISCVendor Advisory
https://support.apple.com/HT210353

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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