CVE-2021-1815 json
A parsing issue in the handling of directory paths was addressed with improved path validation.
published 5y ago modified 4mo ago also EUVD-2021-7279
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. A local user may be able to modify protected parts of the file system.
Patch / fix
- Apple iOS and iPadOS 14.5
- Apple tvOS 14.5
- Apple watchOS 7.4
- Apple macOS 11.3
Is CVE-2021-1815 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
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:N/I:P/A:N |
Affected products
- Apple iOS and iPadOS
- Apple tvOS
- Apple watchOS
- Apple macOS
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
support.apple.com
/en-us/HT212317
vendor-advisory
-
support.apple.com
/en-us/HT212323
vendor-advisory
-
support.apple.com
/en-us/HT212324
vendor-advisory
-
support.apple.com
/en-us/HT212325
vendor-advisory
Sources
- CVE List CVE-2021-1815
- NVD CVE-2021-1815
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.