CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Apple Multiple Products Memory Corruption Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
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.
Affected products
apple: ipados; apple: iphone os; apple: mac os x; apple: macos; apple: watchos
References10
- support.apple.com/en-us/HT211928 Vendor Advisory
- support.apple.com/en-us/HT211929 Vendor Advisory
- support.apple.com/en-us/HT211931 Vendor Advisory
- support.apple.com/en-us/HT211940 Vendor Advisory
- support.apple.com/en-us/HT211944 Vendor Advisory
- support.apple.com/en-us/HT211945 Vendor Advisory
- support.apple.com/en-us/HT211946 Vendor Advisory
- support.apple.com/en-us/HT211947 Vendor Advisory
- support.apple.com/en-us/HT211928 Vendor Advisory
- support.apple.com/en-us/HT211929 Vendor Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 22% percentile: 98 · as of 2 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.