CVE-2021-30786 — A race condition was addressed with improved state handling

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HIGH

A race condition was addressed with improved state handling

Published Sep 8, 2021

7.0

HIGH

CVSS 3.1

EPSS 0.79%

Description

A race condition was addressed with improved state handling. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. Opening a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution.

Affected products

Vendor Apple Product iOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <14.7
Vendor Apple Product macOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <11.5

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

iOS

n/a

Version	Status	Constraints
unspecified	affected	<14.7

Apple

macOS

n/a

Version	Status	Constraints
unspecified	affected	<11.5

Remediation

No remediation recorded yet.

Metrics

0.79% 0.00791

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

EPSS probability 0.00791

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 (12 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	0.79% (0.00791)	54.66th	v5 (v2026.06.15)
Jun 15, 2026	0.77% (0.00765)	50.49th	v5 (v2026.06.15)
Mar 17, 2025	0.24% (0.00245)	45.87th	v4 (v2025.03.14)
Dec 12, 2024	0.08% (0.00085)	37.98th	v3 (v2023.03.01)
May 21, 2024	0.08% (0.00079)	33.66th	v3 (v2023.03.01)
Nov 15, 2023	0.08% (0.00076)	31.66th	v3 (v2023.03.01)
Mar 7, 2023	0.07% (0.00073)	29.63th	v3 (v2023.03.01)
Mar 6, 2023	1.00% (0.01005)	38.10th	v2 (v2022.01.01)
Apr 1, 2022	1.00% (0.01005)	34.40th	v2 (v2022.01.01)
Feb 4, 2022	2.68% (0.02683)	62.15th	v2 (v2022.01.01)
Feb 3, 2022	0.72% (0.00721)	19.92th	v5 (v2026.06.15)
Sep 9, 2021	1.09% (0.01095)	65.89th	v1

Weaknesses (1)

CWE-362

Race Condition

References (2)

https://support.apple.com/en-us/HT212601
x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT212602
x_refsource_MISCRelease NotesVendor Advisory

Link	Providers	Tags
https://support.apple.com/en-us/HT212601		x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT212602		x_refsource_MISCRelease NotesVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner apple

Published Sep 8, 2021

Updated Aug 3, 2024

Reserved Apr 13, 2021

Link CVE-2021-30786

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2021-30786

Red Hat

Severity n/a

Public date n/a

Links CVE-2021-30786