CVE-2020-9873 — An out-of-bounds read was addressed with improved input validation

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HIGH

An out-of-bounds read was addressed with improved input validation

Published Oct 22, 2020

7.8

HIGH

CVSS 3.1

EPSS 1.33%

Description

An out-of-bounds read was addressed with improved input validation. 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. Processing a maliciously crafted image may lead to arbitrary code execution.

Affected products

Vendor Apple Product iCloud for Windows Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iCloud for Windows 11.3
Vendor Apple Product iCloud for Windows (Legacy) Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iCloud for Windows 7.20
Vendor Apple Product iOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iOS 13.6 and iPadOS 13.6
Vendor Apple Product iTunes for Windows Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <iTunes 12.10.8 for Windows
Vendor Apple Product macOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <macOS Catalina 10.15.6
Vendor Apple Product tvOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <tvOS 13.4.8
Vendor Apple Product watchOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <watchOS 6.2.8

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Apple

iCloud for Windows

n/a

Version	Status	Constraints
unspecified	affected	<iCloud for Windows 11.3

Apple

iCloud for Windows (Legacy)

n/a

Version	Status	Constraints
unspecified	affected	<iCloud for Windows 7.20

Apple

iOS

n/a

Version	Status	Constraints
unspecified	affected	<iOS 13.6 and iPadOS 13.6

Apple

iTunes for Windows

n/a

Version	Status	Constraints
unspecified	affected	<iTunes 12.10.8 for Windows

Apple

macOS

n/a

Version	Status	Constraints
unspecified	affected	<macOS Catalina 10.15.6

Apple

tvOS

n/a

Version	Status	Constraints
unspecified	affected	<tvOS 13.4.8

Apple

watchOS

n/a

Version	Status	Constraints
unspecified	affected	<watchOS 6.2.8

Remediation

No remediation recorded yet.

Metrics

1.33% 0.01334

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01334

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3
EPSS v4

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3
EPSS v4

Table of values (14 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.33% (0.01334)	70.12th	v5 (v2026.06.15)
Jun 15, 2026	1.28% (0.01279)	66.10th	v5 (v2026.06.15)
Jun 28, 2025	0.42% (0.00424)	61.28th	v4 (v2025.03.14)
Mar 29, 2025	1.53% (0.01533)	69.61th	v4 (v2025.03.14)
Jul 20, 2024	0.13% (0.00126)	47.82th	v3 (v2023.03.01)
Sep 3, 2023	0.13% (0.00126)	46.50th	v3 (v2023.03.01)
Mar 7, 2023	0.08% (0.00082)	33.20th	v3 (v2023.03.01)
Mar 6, 2023	1.36% (0.01363)	71.45th	v2 (v2022.01.01)
Apr 1, 2022	1.36% (0.01363)	69.40th	v2 (v2022.01.01)
Feb 4, 2022	3.19% (0.03189)	65.13th	v2 (v2022.01.01)
Feb 3, 2022	1.91% (0.01913)	48.23th	v1
Jan 6, 2022	1.91% (0.01913)	47.71th	v1
Jan 5, 2022	0.43% (0.00433)	26.84th	v5 (v2026.06.15)
Apr 14, 2021	0.43% (0.00433)	0.00th	v1

Weaknesses (1)

CWE-125

Out-of-bounds Read

References (7)

https://support.apple.com/kb/HT211288
x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211289
x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211290
x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211291
x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211293
x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211294
x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211295
x_refsource_MISCVendor Advisory

Link	Providers	Tags
https://support.apple.com/kb/HT211288		x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211289		x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211290		x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211291		x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211293		x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211294		x_refsource_MISCVendor Advisory
https://support.apple.com/kb/HT211295		x_refsource_MISCVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner apple

Published Oct 22, 2020

Updated Aug 4, 2024

Reserved Mar 2, 2020

Link CVE-2020-9873

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-9873

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-9873