What’s Vulnerable › Vulnerabilities

CVE-2020-9897

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-28 · updated 2026-06-17
• Weakness: CWE-787

Description

An out-of-bounds write was addressed with improved input validation. This issue is fixed in iOS 14.2 and iPadOS 14.2, macOS Big Sur 11.0.1. Processing a maliciously crafted PDF may lead to arbitrary code execution.

Affected products

• Apple iPadOS: before 14.2 — fixed in 14.2
• Apple Iphone Os: before 14.2 — fixed in 14.2
• Apple macOS: before 11.0.1 — fixed in 11.0.1

How to fix

Upgrade to a fixed version: Apple iPadOS 14.2; Apple Iphone Os 14.2; Apple macOS 11.0.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT211929
• https://support.apple.com/en-us/HT211931
• https://support.apple.com/en-us/HT211929
• https://support.apple.com/en-us/HT211931

Get alerted when CVE-2020-9897 or the next vulnerability affects your stack