CVE-2020-9900 json
An issue existed within the path validation logic for symlinks.
published 2020-10-22 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-30679
- cvss
- 7.8
- 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 33%
- public exploits
- 0
- none known
Summary
An issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitization. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. A local attacker may be able to elevate their privileges.
Patch / fix
- Apple iOS iOS 13.6 and iPadOS 13.6
- Apple macOS macOS Catalina 10.15.6
- Apple tvOS tvOS 13.4.8
- Apple watchOS watchOS 6.2.8
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% 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:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Apple iOS
- Apple macOS
- Apple tvOS
- Apple watchOS
Classification
- Weakness
-
- CWE-59 Improper Link Resolution Before File Access
References
-
support.apple.com
/kb/HT211289
vendor-advisory
-
support.apple.com
/kb/HT211288
vendor-advisory
-
support.apple.com
/kb/HT211290
vendor-advisory
-
support.apple.com
/kb/HT211291
vendor-advisory
Sources
- CVE List CVE-2020-9900
- NVD CVE-2020-9900
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.