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Known Exploited Vulnerability
7.0
HIGH CVSS 3.1
CVE-2021-1782
Apple Multiple Products Race Condition Vulnerability - [Actively Exploited]
Description

A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..

INFO

Published Date :

April 2, 2021, 6:15 p.m.

Last Modified :

Oct. 23, 2025, 6:01 p.m.

Remotely Exploit :

No

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Apple iOS, iPadOs, macOS, watchOS, and tvOS contain a race condition vulnerability that may allow a malicious application to elevate privileges.

Required Action :

Apply updates per vendor instructions.

Notes :

https://nvd.nist.gov/vuln/detail/CVE-2021-1782

Affected Products

The following products are affected by CVE-2021-1782 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apple macos
2 Apple mac_os_x
3 Apple iphone_os
4 Apple tvos
5 Apple watchos
6 Apple ipados
: Total Affected Vendor : 1 | Products : 6
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.1 HIGH [email protected]
CVSS 3.1 HIGH 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Apple products are affected by a race condition vulnerability that could allow for privilege escalation; upgrading to the latest version of the affected operating systems will address the issue.
  • Upgrade to iOS 14.4 or later.
  • Upgrade to macOS Big Sur 11.2, macOS Catalina, macOS Mojave, or later.
  • Upgrade to watchOS 7.3 or later.
  • Upgrade to tvOS 14.4 or later.
Public PoC/Exploit Available at Github

CVE-2021-1782 has a 22 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-1782.

URL Resource
https://support.apple.com/en-us/HT212146 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212147 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212148 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212149 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212146 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212147 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212148 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT212149 Release Notes Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-1782 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-1782 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
pawan-shivarkar/List-of-CVE-s-

Contains List of CVE's that I have found (Individual + Collaborative work)

Updated: 2 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : July 28, 2025, 1:07 p.m. This repo has been linked 106 different CVEs too.
Profile Photo
ggghost210/ios-resources

None

Updated: 10 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Dec. 17, 2024, 10:53 p.m. This repo has been linked 9 different CVEs too.
Profile Photo
BananeRapeuse/tfjailbreak.github.io

TF_Jailbreak (Online/Fake) - iOS/iPadOS 12.0-18.x beta - to install Cydia 2

HTML

Updated: 1 year, 2 months ago
1 stars 0 fork 0 watcher
Born at : July 31, 2024, 1:37 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
NaInSec/CVE-PoC-in-GitHub

All CVE - PoC in GitHub

poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate

Updated: 4 months, 4 weeks ago
12 stars 3 fork 3 watcher
Born at : March 22, 2024, 3:58 p.m. This repo has been linked 931 different CVEs too.
Profile Photo
zecool/cve

None

Updated: 4 months, 1 week ago
2 stars 0 fork 0 watcher
Born at : March 11, 2024, 1:21 p.m. This repo has been linked 935 different CVEs too.
Profile Photo
anik2sd/oln

None

C Objective-C

Updated: 2 years, 4 months ago
3 stars 2 fork 2 watcher
Born at : June 23, 2023, 9:31 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
whoforget/CVE-POC

None

Updated: 2 years, 7 months ago
0 stars 2 fork 2 watcher
Born at : April 8, 2023, 6:19 a.m. This repo has been linked 928 different CVEs too.
Profile Photo
k0mi-tg/CVE-POC

None

Updated: 1 year, 8 months ago
20 stars 3 fork 3 watcher
Born at : Feb. 14, 2023, 6:10 p.m. This repo has been linked 921 different CVEs too.
Profile Photo
WhooAmii/POC_to_review

None

Updated: 5 months, 1 week ago
2 stars 2 fork 2 watcher
Born at : Nov. 25, 2022, 5:43 p.m. This repo has been linked 935 different CVEs too.
Profile Photo
soosmile/POC

None

Updated: 7 months ago
9 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 944 different CVEs too.
Profile Photo
Ostorlab/KEV

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

cisa-kev vulnerability 0day cisa exploits

Updated: 3 weeks ago
588 stars 42 fork 42 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1290 different CVEs too.
Profile Photo
H0aHuynh/LiRa

LiRa jailbreak iOS 14.0 - 14.3

C Objective-C

Updated: 3 months, 2 weeks ago
6 stars 2 fork 2 watcher
Born at : June 24, 2021, 1:05 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
joydo/CVE-Writeups

My Personal Reading lists for CVE Writeups

Python

Updated: 3 months, 3 weeks ago
36 stars 5 fork 5 watcher
Born at : April 15, 2021, 1:15 a.m. This repo has been linked 31 different CVEs too.
Profile Photo
developer3000S/PoC-in-GitHub

None

Updated: 4 months ago
37 stars 4 fork 4 watcher
Born at : March 12, 2021, 12:22 p.m. This repo has been linked 1063 different CVEs too.
Profile Photo
janderson61890/jailbreak

None

C C++ Objective-C

Updated: 4 years, 7 months ago
0 stars 0 fork 0 watcher
Born at : March 3, 2021, 2:13 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-1782 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2021-1782 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Oct. 23, 2025

    Action Type Old Value New Value
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 22, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Removed Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1782
  • Modified Analysis by [email protected]

    Feb. 28, 2025

    Action Type Old Value New Value
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Feb. 03, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-667
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://support.apple.com/en-us/HT212146
    Added Reference https://support.apple.com/en-us/HT212147
    Added Reference https://support.apple.com/en-us/HT212148
    Added Reference https://support.apple.com/en-us/HT212149
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Feb. 09, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Apr. 09, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://support.apple.com/en-us/HT212146 No Types Assigned https://support.apple.com/en-us/HT212146 Release Notes, Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT212147 No Types Assigned https://support.apple.com/en-us/HT212147 Release Notes, Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT212148 No Types Assigned https://support.apple.com/en-us/HT212148 Release Notes, Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT212149 No Types Assigned https://support.apple.com/en-us/HT212149 Release Notes, Vendor Advisory
    Added CWE NIST CWE-269
    Added CWE NIST CWE-362
    Added CPE Configuration OR *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 14.4 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 14.4 *cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* versions from (including) 10.14 up to (excluding) 10.14.6 *cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-004:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-005:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-006:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2020-007:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.14.6:supplemental_update_2:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* versions from (including) 10.15 up to (excluding) 10.15.7 *cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:* *cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:* *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 11.0 up to (excluding) 11.2 *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 14.4 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 7.3
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 6.9
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

8.53 }} 0.18%

score

0.91973

percentile