Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH

8.8 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

0.53 %

Predictive Probability

Percentile Rank

67.1 th

Documented as more likely to be exploited than 67.1% of known CVEs.

Detection Date

Nov 03, 2021

Remediation Due

May 03, 2022

CISA Catalog Active

Threat Analysis

Apple iOS, iPadOS, and watchOS Mail contains an out-of-bounds write vulnerability which may allow memory modification or application termination when processing a maliciously crafted mail message.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2020-9818