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

- Exploited (CISA KEV): yes, added 2022-09-08
- Published: 2020-10-16
- CVSS: 5.5 MEDIUM (v3.1)
- EPSS: 3.2% (88th percentile)

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Before feed history | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2020-9934 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2020-9934