How severe is CVE-2020-9934?

CVE-2020-9934 has a CVSS 3.1 base score of 5.5 (MEDIUM). EPSS estimates a 3.2% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

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

CISA Known Exploited Vulnerabilities

Apple iOS, iPadOS, and macOS Input Validation Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2022-09-08

Remediation due

2022-09-29

Required action
Apply updates per vendor instructions.

CISA notes
https://support.apple.com/en-us/HT211288, https://support.apple.com/en-us/HT211289; https://nvd.nist.gov/vuln/detail/CVE-2020-9934

Description

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.

Severity

CVSS 3.1 · CISA5.5 MEDIUM

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

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impactpartial

Affected Products

Vendor	Product	Affected versions
Apple	iOS	unspecified to <iOS 13.6 and iPadOS 13.6
Apple	macOS	unspecified to <macOS Catalina 10.15.6

References

2 Links

Other references

Record Details

Published

2020-10-16

Last updated

2025-10-21

Assigner (CNA)

apple

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.