# CVE-2021-30983: Apple iOS and iPadOS Buffer Overflow Vulnerability

- Exploited (CISA KEV): yes, added 2022-06-27
- Published: 2021-08-24
- CVSS: 7.8 HIGH (v3.1)
- EPSS: 2.9% (87th percentile)
- CWE: CWE-119

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

## 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-2021-30983 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2021-30983