CVE-2020-9966 json
An out-of-bounds read was addressed with improved input validation.
published 2020-12-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-30745
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
Summary
An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0, iOS 14.0 and iPadOS 14.0. An application may be able to execute arbitrary code with kernel privileges.
Patch / fix
- Apple tvOS 14.0
- Apple watchOS 7.0
- Apple iOS and iPadOS 14.0
- Apple macOS 11.0
Exploit prediction
1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Apple tvOS
- Apple watchOS
- Apple iOS and iPadOS
- Apple macOS
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/en-us/HT211843
vendor-advisory
-
support.apple.com
/en-us/HT211850
vendor-advisory
-
support.apple.com
/en-us/HT211844
vendor-advisory
-
support.apple.com
/en-us/HT211931
vendor-advisory
-
seclists.org
/fulldisclosure/2020/Dec/32
mailing-list, third-party-advisory
Sources
- CVE List CVE-2020-9966
- NVD CVE-2020-9966
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.