CVE-2020-9934Apple iOS, iPadOS, and macOS Input Validation Vulnerability

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.

5.5 MEDIUMEPSS 3.20%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 03:28 UTC

OverviewCVSS details

5.5MEDIUMCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Oct 16, 2020
Assigner: apple

Affected

iOS (Apple)

Versions: before iOS 13.6 and iPadOS 13.6
Fixed in: iOS 13.6 and iPadOS 13.6

+1 more product →

Exploitation

Public exploit: None listed
CISA KEV: Listed · Sep 8, 2022
KEV due date: Sep 29, 2022
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact partial

EPSS · FIRST, scored Nov 6

3.20%chance of exploitation in 30 days

Higher than 88.22% of CVEs

CVSS 3.1 · NVD

5.5Medium

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

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: None
Availability impact: None

CVSS 2.0 · NVD

2.1Low

AV:L/AC:L/Au:N/C:P/I:N/A:N

Attack vector: Local
Attack complexity: Low
Authentication: None
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
5.5	MEDIUM	3.1NVD	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1	LOW	2.0NVD	AV:L/AC:L/Au:N/C:P/I:N/A:N

CISA required action

⚡ Known exploited · remediation due Sep 29, 2022

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Details

CVE ID: CVE-2020-9934
Status: Analyzed
Assigner (CNA): apple
Published: Oct 16, 2020
Last modified: 2026-06-17 03:28 UTC

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-07 14:07 UTC.