Out-of-bounds write in Apple iOS and iPadOS
Priority LOW 37CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.4, iOS 14.6 and iPadOS 14.6, watchOS 7.5, tvOS 14.6. Processing a maliciously crafted font file may lead to arbitrary code execution.
Why it matters now
EPSS 0.01347 71st percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 14.6macOS (Apple): 11.4+2 more products
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apple | iOS and iPadOS | before 14.6 | 14.6 | Patch available | CNA |
| Apple | macOS | before 11.4 | 11.4 | Patch available | CNA |
| Apple | tvOS | before 14.6 | 14.6 | Patch available | CNA |
| Apple | watchOS | before 7.5 | 7.5 | Patch available | CNA |
- iOS and iPadOS VendorApple Affected before 14.6 Fixed in 14.6 Patch available CNA
- macOS VendorApple Affected before 11.4 Fixed in 11.4 Patch available CNA
- tvOS VendorApple Affected before 14.6 Fixed in 14.6 Patch available CNA
- watchOS VendorApple Affected before 7.5 Fixed in 7.5 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 14.6 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 14.6 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | 11.0 to before 11.4 | Vulnerable | Apple |
| cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* | before 14.6 | Vulnerable | Apple |
| cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* | before 7.5 | Vulnerable | Apple |
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.6 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.6 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.4 Vulnerable ·Apple
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.6 Vulnerable ·Apple
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.5 Vulnerable ·Apple
Remediation
- Fix · CNA iOS and iPadOS (Apple) Fixed in 14.6
- Fix · CNA macOS (Apple) Fixed in 11.4
- Fix · CNA tvOS (Apple) Fixed in 14.6
- Fix · CNA watchOS (Apple) Fixed in 7.5
Timeline
- 2026-10-02 Threatist record created from CVE-2021-30771
- 2026-10-03 Alias added: GHSA-qh6f-fwr4-m984
References
More Apple Ipados vulnerabilities
- TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
- TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
- TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-30771 · CVE Program
- CVE-2021-30771 · NVD
- FIRST EPSS
- GHSA-qh6f-fwr4-m984 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences