CVE-2020-27930

KEVApple Multiple Products Memory Corruption Vulnerability

Description

Apple iOS, iPadOS, macOS, and watchOS FontParser contain a memory corruption vulnerability which may allow for code execution when processing maliciously crafted front.

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.

CVSS 3.1 vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

PublishedDec 8, 2020

Last modifiedJun 17, 2026

Added to KEVNov 3, 2021

Remediation dueMay 3, 2022

References

packetstormsecurity.com/files/161294/Apple-Safari-Remote-Code-Execution.htmlThird Party AdvisoryVDB Entry
seclists.org/fulldisclosure/2020/Dec/32Mailing ListThird Party Advisory
support.apple.com/en-us/HT211928Vendor Advisory
support.apple.com/en-us/HT211929Vendor Advisory
support.apple.com/en-us/HT211931Vendor Advisory
support.apple.com/en-us/HT211940Vendor Advisory
support.apple.com/en-us/HT211944Vendor Advisory
support.apple.com/en-us/HT211945Vendor Advisory
support.apple.com/en-us/HT211946Vendor Advisory
support.apple.com/en-us/HT211947Vendor Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27930US Government Resource

0 recent articles mention this CVE

Risk assessment · High

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1637 days
CVSS: 7.8 HIGH
EPSS (30-day exploit probability): 22.0% · top 2% of all CVEs
Weakness: CWE-787

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.