Out-of-bounds write in Apple iOS
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
A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. An application may be able to execute arbitrary code with kernel privileges.
Why it matters now
EPSS 0.01351 71st percentileScored 2026-11-07
Fix Fixed iOS (Apple): 14.7macOS (Apple): 11.5
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 | before 14.7 | 14.7 | Patch available | CNA |
| Apple | macOS | before 11.5 | 11.5 | Patch available | CNA |
- iOS VendorApple Affected before 14.7 Fixed in 14.7 Patch available CNA
- macOS VendorApple Affected before 11.5 Fixed in 11.5 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 14.7 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 14.7 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | before 11.5 | Vulnerable | Apple |
| cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* | before 14.7 | Vulnerable | Apple |
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.7 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.7 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 11.5 Vulnerable ·Apple
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.7 Vulnerable ·Apple
Remediation
- Fix · CNA iOS (Apple) Fixed in 14.7
- Fix · CNA macOS (Apple) Fixed in 11.5
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apple macOS 11.5
35 records Highest priority Priority MEDIUM 6 MEDIUM, 29 LOW
Other records, highest priority first
- TI-2021-11181 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 48
- TI-2021-11171 Apple Security Update - Catalina: An application may be able to execute arbitrary code…Priority MEDIUM 48
- TI-2021-11176 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 42
- Release ·
Apple iOS 14.7
29 records Highest priority Priority MEDIUM 5 MEDIUM, 24 LOW
Other records, highest priority first
- TI-2021-11176 Out-of-bounds write in Apple Security Update - CatalinaPriority MEDIUM 42
- TI-2021-11174 Apple iOS: Processing maliciously crafted web content may lead to code executionPriority MEDIUM 42
- TI-2021-11172 Use after free in Apple iOSPriority MEDIUM 42
Timeline
- 2026-10-02 Threatist record created from CVE-2021-30748
- 2026-10-03 Alias added: GHSA-v33h-cmh6-v795
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-2021-30748 · CVE Program
- CVE-2021-30748 · NVD
- FIRST EPSS
- GHSA-v33h-cmh6-v795 · 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