Apple tvOS: A remote attacker may be able to cause a denial of service
Priority LOW 38Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iCloud for Windows 7.21, tvOS 14.0. A remote attacker may be able to cause a denial of service.
Why it matters now
EPSS 0.02822 86th percentileScored 2026-11-07
Fix Fixed tvOS (Apple): 14.0watchOS (Apple): 7.0+3 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 | tvOS | before 14.0 | 14.0 | Patch available | CNA |
| Apple | watchOS | before 7.0 | 7.0 | Patch available | CNA |
| Apple | iCloud for Windows | before 7.21 | 7.21 | Patch available | CNA |
| Apple | iOS and iPadOS | before 14.0 | 14.0 | Patch available | CNA |
| Apple | macOS | before 11.0 | 11.0 | Patch available | CNA |
| Apple | macOS | before 11.0 | 11.0 | Patch available | CNA |
- tvOS VendorApple Affected before 14.0 Fixed in 14.0 Patch available CNA
- watchOS VendorApple Affected before 7.0 Fixed in 7.0 Patch available CNA
- iCloud for Windows VendorApple Affected before 7.21 Fixed in 7.21 Patch available CNA
- iOS and iPadOS VendorApple Affected before 14.0 Fixed in 14.0 Patch available CNA
- macOS VendorApple Affected before 11.0 Fixed in 11.0 Patch available CNA
- macOS VendorApple Affected before 11.0 Fixed in 11.0 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:* | before 7.21; 11.0 to before 11.4 | Vulnerable | Apple |
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 14.0 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 14.0 | Vulnerable | Apple |
| cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* | before 11.0.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* | before 14.0 | Vulnerable | Apple |
| cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* | before 7.0 | Vulnerable | Apple |
- cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:* Versions before 7.21; 11.0 to before 11.4 Vulnerable ·Apple
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
- cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 11.0.1 Vulnerable ·Apple
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.0 Vulnerable ·Apple
Remediation
- Fix · CNA tvOS (Apple) Fixed in 14.0
- Fix · CNA watchOS (Apple) Fixed in 7.0
- Fix · CNA iCloud for Windows (Apple) Fixed in 7.21
- Fix · CNA iOS and iPadOS (Apple) Fixed in 14.0
- Fix · CNA macOS (Apple) Fixed in 11.0
- Fix · CNA macOS (Apple) Fixed in 11.0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apple macOS 11.0
45 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 4 MEDIUM, 38 LOW
Other records, highest priority first
- TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
- TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
- TI-2020-17004 Apple watchOS: A malicious application may be able to disclose kernel memoryPriority HIGH 82
- Release ·
Apple iOS and iPadOS 14.0
17 records Highest priority Priority MEDIUM 2 MEDIUM, 15 LOW
Other records, highest priority first
- TI-2020-08020 Use after free in Apple tvOSPriority MEDIUM 42
- TI-2020-08023 Use after free in Apple tvOSPriority MEDIUM 41
- TI-2020-08081 Apple tvOS: An application may be able to execute arbitrary code with kernel privilegesPriority LOW 37
Show 2 more groups
- Release ·
Apple watchOS 7.0
13 records Highest priority Priority MEDIUM 2 MEDIUM, 11 LOW
Other records, highest priority first
- TI-2020-08020 Use after free in Apple tvOSPriority MEDIUM 42
- TI-2020-08023 Use after free in Apple tvOSPriority MEDIUM 41
- TI-2020-08051 Use after free in Apple tvOSPriority LOW 37
- Release ·
Apple tvOS 14.0
12 records Highest priority Priority MEDIUM 2 MEDIUM, 10 LOW
Other records, highest priority first
- TI-2020-08020 Use after free in Apple tvOSPriority MEDIUM 42
- TI-2020-08023 Use after free in Apple tvOSPriority MEDIUM 41
- TI-2020-08081 Apple tvOS: An application may be able to execute arbitrary code with kernel privilegesPriority LOW 37
Timeline
- 2026-10-02 Threatist record created from CVE-2020-9991
- 2026-10-03 Alias added: GHSA-5pgw-jw9q-8cfq
References
Advisory 7
- https://support.apple.com/kb/HT211846
- https://support.apple.com/en-us/HT211843
- https://support.apple.com/en-us/HT211850
- https://support.apple.com/en-us/HT211844
- https://support.apple.com/en-us/HT211931
- https://support.apple.com/en-us/HT211847
- 20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1
More Apple Icloud vulnerabilities
- TI-2019-06084 Type confusion in Apple iOS KEVCVSS 3.1HIGH 8.8
- TI-2020-16987 Type confusion in Apple watchOS KEVCVSS 3.1HIGH 7.8
- TI-2020-07926 Apple iOS: A remote attacker may be able to cause arbitrary code execution CVSS 3.1CRITICAL 9.8
- TI-2018-03187 Memory corruption in Apple WebKit CVSS 3.1HIGH 8.8
- TI-2018-03118 Memory corruption in Apple WebKit CVSS 3.0HIGH 8.8
- TI-2018-03361 Memory corruption in iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows CVSS 3.0HIGH 8.8
Sources
- CVE-2020-9991 · CVE Program
- CVE-2020-9991 · NVD
- FIRST EPSS
- GHSA-5pgw-jw9q-8cfq · 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