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CVE-2020-9934

MediumPublished

Apple iOS, iPadOS, and macOS Input Validation Vulnerability

Published: Oct 16, 2020
Updated: Oct 21, 2025
Assigning CNA: apple
Evidence observed: Sep 8, 2022

Primary CVSS

5.5/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

3.2%

Low · next 30 days

Percentile: 87.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A local user may be able to view sensitive user information.

Sources

CVE-2020-9934PoC
CVE-2020–9934 POC

Responsible use

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