CVE-2020-9934
Apple iOS, iPadOS, and macOS Input Validation Vulnerability
- Medium 5.5
- Exploited: added to CISA KEV 8 Sep 2022
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.
Key facts
- Published
- 16 Oct 2020
- Last changed
- 21 Oct 2025
- Assigned by
- apple
- KEV added
- 8 Sep 2022
- KEV fix due
- 29 Sep 2022
- EPSS
- 3.208% likely to be exploited in the next 30 days, higher than 88.369% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 5.5CVSS 3.1, Mediumfrom CISA (ADP container)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Apple | iOS |
|
| Apple | macOS |
|
Timeline
- 16 Oct 2020 Published
- 8 Sep 2022 CVE-2020-9934 added to CISA KEV
- 8 Sep 2022 Added to the CISA KEV catalogue