CVE-2021-30681 json
A validation issue existed in the handling of symlinks.
published 2021-09-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17598
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 63%
- public exploits
- 0
- none known
Summary
A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in Security Update 2021-004 Mojave, iOS 14.6 and iPadOS 14.6, Security Update 2021-003 Catalina, macOS Big Sur 11.4, watchOS 7.5. A malicious application may be able to gain root privileges.
Patch / fix
- Apple iOS and iPadOS 14.6
- Apple macOS 7.5, 11.4, 2021
Exploit prediction
1.03% chance of exploitation in the next 30 days, higher than 63% 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 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Affected products
- Apple iOS and iPadOS
- Apple macOS
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
support.apple.com
/en-us/HT212528
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212529
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212533
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212530
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212531
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-30681
- NVD CVE-2021-30681
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.