CVE-2021-30805 json
A memory corruption issue was addressed with improved input validation.
published 2021-09-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17722
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.1%
- EPSS 3.1% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to execute arbitrary code with kernel privileges.
Patch / fix
- Apple Security Update - Catalina 2021
- Apple macOS 11.5, 2021
Exploit prediction
3.15% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- Apple Security Update - Catalina
- Apple macOS
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
support.apple.com
/en-us/HT212602
vendor-advisory
-
support.apple.com
/en-us/HT212600
vendor-advisory
-
support.apple.com
/en-us/HT212603
vendor-advisory
Sources
- CVE List CVE-2021-30805
- NVD CVE-2021-30805
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.