1. Home
  2. Vulnerabilities
  3. CVE-2020-27930
Known Exploited Vulnerability
7.8
HIGH CVSS 3.1
CVE-2020-27930
Apple Multiple Products Memory Corruption Vulnerability - [Actively Exploited]
Description

A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. Processing a maliciously crafted font may lead to arbitrary code execution.

INFO

Published Date :

Dec. 8, 2020, 9:15 p.m.

Last Modified :

Oct. 27, 2025, 5:38 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, and watchOS FontParser contain a memory corruption vulnerability which may allow for code execution when processing maliciously crafted front.

Required Action :

Apply updates per vendor instructions.

Notes :

https://nvd.nist.gov/vuln/detail/CVE-2020-27930

Affected Products

The following products are affected by CVE-2020-27930 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 watchos
5 Apple ipados
: Total Affected Vendor : 1 | Products : 5
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
An actively exploited memory corruption vulnerability exists in multiple Apple products.
  • Upgrade iOS to version 12.4.9 or 14.2, or later.
  • Upgrade macOS to version 10.15.7, 11.0.1, or later.
  • Upgrade watchOS to version 5.3.9, 6.2.9, or 7.1, or later.
Public PoC/Exploit Available at Github

CVE-2020-27930 has a 4 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-2020-27930.

URL Resource
http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2020/Dec/32 Mailing List Third Party Advisory
https://support.apple.com/en-us/HT211928 Vendor Advisory
https://support.apple.com/en-us/HT211929 Vendor Advisory
https://support.apple.com/en-us/HT211931 Vendor Advisory
https://support.apple.com/en-us/HT211940 Vendor Advisory
https://support.apple.com/en-us/HT211944 Vendor Advisory
https://support.apple.com/en-us/HT211945 Vendor Advisory
https://support.apple.com/en-us/HT211946 Vendor Advisory
https://support.apple.com/en-us/HT211947 Vendor Advisory
http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2020/Dec/32 Mailing List Third Party Advisory
https://support.apple.com/en-us/HT211928 Vendor Advisory
https://support.apple.com/en-us/HT211929 Vendor Advisory
https://support.apple.com/en-us/HT211931 Vendor Advisory
https://support.apple.com/en-us/HT211940 Vendor Advisory
https://support.apple.com/en-us/HT211944 Vendor Advisory
https://support.apple.com/en-us/HT211945 Vendor Advisory
https://support.apple.com/en-us/HT211946 Vendor Advisory
https://support.apple.com/en-us/HT211947 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27930 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-2020-27930 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-2020-27930 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
Knoxpix/PACKernel

PAC Kernel Extension Demo for macOS

C

Updated: 6 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : April 18, 2025, 4:14 a.m. This repo has been linked 4 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
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
FunPhishing/Apple-Safari-Remote-Code-Execution-CVE-2020-27930

Apple Safari Remote Code Execution

Updated: 4 years, 8 months ago
0 stars 2 fork 2 watcher
Born at : Feb. 7, 2021, 11:28 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-2020-27930 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-2020-27930 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. 27, 2025

    Action Type Old Value New Value
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27930 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-2020-27930
  • 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-2020-27930
  • 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-2020-27930
  • Modified Analysis by [email protected]

    Mar. 13, 2025

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

    Jan. 29, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Added CWE CWE-787
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html
    Added Reference http://seclists.org/fulldisclosure/2020/Dec/32
    Added Reference https://support.apple.com/en-us/HT211928
    Added Reference https://support.apple.com/en-us/HT211929
    Added Reference https://support.apple.com/en-us/HT211931
    Added Reference https://support.apple.com/en-us/HT211940
    Added Reference https://support.apple.com/en-us/HT211944
    Added Reference https://support.apple.com/en-us/HT211945
    Added Reference https://support.apple.com/en-us/HT211946
    Added Reference https://support.apple.com/en-us/HT211947
  • CVE Modified by [email protected]

    May. 14, 2024

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

    Feb. 11, 2021

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html Third Party Advisory, VDB Entry
    Changed Reference Type http://seclists.org/fulldisclosure/2020/Dec/32 No Types Assigned http://seclists.org/fulldisclosure/2020/Dec/32 Mailing List, Third Party Advisory
    Removed CWE NIST CWE-20
    Added CWE NIST CWE-787
  • CVE Modified by [email protected]

    Feb. 05, 2021

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.html [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 15, 2020

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/Dec/32 [No Types Assigned]
  • Initial Analysis by [email protected]

    Dec. 09, 2020

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://support.apple.com/en-us/HT211928 No Types Assigned https://support.apple.com/en-us/HT211928 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT211929 No Types Assigned https://support.apple.com/en-us/HT211929 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT211931 No Types Assigned https://support.apple.com/en-us/HT211931 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT211940 No Types Assigned https://support.apple.com/en-us/HT211940 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT211944 No Types Assigned https://support.apple.com/en-us/HT211944 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT211945 No Types Assigned https://support.apple.com/en-us/HT211945 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT211946 No Types Assigned https://support.apple.com/en-us/HT211946 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT211947 No Types Assigned https://support.apple.com/en-us/HT211947 Vendor Advisory
    Added CWE NIST CWE-20
    Added CPE Configuration OR *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 14.2 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 12.4.9 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions from (including) 14.0 up to (excluding) 14.2 *cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* versions up to (excluding) 10.15.7 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 11.0 up to (excluding) 11.0.1 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 5.3.9 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions from (including) 6.0 up to (excluding) 6.2.9 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions from (including) 7.0 up to (excluding) 7.1
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: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 6.8
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.

49.33 }} 0.50%

score

0.97634

percentile