CVE-2021-30789 json
An out-of-bounds read was addressed with improved input validation.
published 5y ago modified 4mo ago also EUVD-2021-17706
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% 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 iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-004 Catalina. Processing a maliciously crafted font file may lead to arbitrary code execution.
Patch / fix
- Apple Security Update - Catalina 2021
- Apple iOS 14.7
- Apple macOS 7.6, 11.5, 14.7
Is CVE-2021-30789 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.25% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).
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 Security Update - Catalina
- Apple iOS
- Apple macOS
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/en-us/HT212601
vendor-advisory
-
support.apple.com
/en-us/HT212602
vendor-advisory
-
support.apple.com
/en-us/HT212605
vendor-advisory
-
support.apple.com
/en-us/HT212600
vendor-advisory
-
support.apple.com
/en-us/HT212604
vendor-advisory
Sources
- CVE List CVE-2021-30789
- NVD CVE-2021-30789
Fencer Intel 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.