CVE-2020-9934An issue existed in the handling of environment variables.
Updated under an hour ago ()
Does this affect you?
It affects Apple iOS and 4 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Sep 8, 2022; federal agencies had to remediate by Sep 29, 2022. Treat that date as your deadline.
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Free account, 1 product
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.
- CVSS
- 5.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Added to CISA KEV Sep 8, 2022; federal remediation due Sep 29, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 3.21% (percentile 88)
- Assigned by
- apple
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apple iOS apple:ios (from the name) | from unspecified before iOS 13.6 and iPadOS 13.6 | CNA record |
Apple macOS apple:macos (from the name) | from unspecified before macOS Catalina 10.15.6 | CNA record |
apple ipados apple:ipados | before 13.6 | NVD |
apple iphone_os apple:iphone_os | before 13.6 | NVD |
apple mac_os_x apple:mac_os_x | before 10.15.6 | NVD |
References
- https://support.apple.com/HT211289x-refsource-misc, release-notes, vendor-advisory
- https://support.apple.com/HT211288x-refsource-misc, release-notes, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9934us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.