CVE-2020-9934: Apple iOS, iPadOS, and macOS Input Validation Vulnerability
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-ef01ef905862, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- Apple iOS, iPadOS, and macOS Input Validation Vulnerability
- Vendor
- Apple
- Product
- iOS, iPadOS, and macOS
- Added to the catalog
- 2022-09-08
- Due date for US federal agencies
- 2022-09-29
- Catalog version
- 2026.10.30
Apple iOS, iPadOS, and macOS contain an unspecified vulnerability involving input validation which can allow a local attacker to view sensitive user information.
Required action (CISA)
Apply updates per vendor instructions.
Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.
Links in CISA's notes
- https://support.apple.com/en-us/HT211288,
- https://support.apple.com/en-us/HT211289
- https://nvd.nist.gov/vuln/detail/CVE-2020-9934
Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
NVD analysis
- Status
- Analyzed
- Published
- 2020-10-16T17:15:17.637
- Last modified
- 2026-06-17T03:28:50.000
- Weaknesses
- NVD-CWE-noinfo
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.
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | [email protected] (Primary) |
| CVSS 3.1 | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | 2.1 | LOW | AV:L/AC:L/Au:N/C:P/I:N/A:N | [email protected] (Primary) |
References
- https://support.apple.com/HT211288 (Release Notes, Vendor Advisory)
- https://support.apple.com/HT211289 (Release Notes, Vendor Advisory)
- https://support.apple.com/HT211288 (Release Notes, Vendor Advisory)
- https://support.apple.com/HT211289 (Release Notes, Vendor Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9934 (US Government Resource)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-02T23:41:51.476Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-9934
CVE record
- Assigner
- apple
- State
- PUBLISHED
- Published
- 2020-10-16T16:51:05.000Z
- Updated
- 2025-10-21T23:35:35.426Z
- Problem types
- A local user may be able to view sensitive user information
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.
References
Read on 2026-11-03T01:05:24.137Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2020/9xxx/CVE-2020-9934.json
Sources and licences
CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
Cite this page
Dragons Eye Ransomware Tracker, "CVE-2020-9934: Apple iOS, iPadOS, and macOS Input Validation Vulnerability",
entity page, dataset version ref-ef01ef905862, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2020-9934 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T03:28:50.000.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:35:35.426Z.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.