CVE-2020-3856 json
A memory corruption issue was addressed with improved input validation.
published 2020-02-27 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-25121
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2. Processing a maliciously crafted string may lead to heap corruption.
Patch / fix
- Apple iOS iOS 13.3.1 and iPadOS 13.3.1
- Apple macOS macOS Catalina 10.15.3
- Apple tvOS tvOS 13.3.1
- Apple watchOS watchOS 6.1.2
Exploit prediction
0.92% chance of exploitation in the next 30 days, higher than 60% 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
- Apple macOS
- Apple tvOS
- Apple watchOS
Classification
References
-
support.apple.com
/HT210919
release-notes, vendor-advisory
-
support.apple.com
/HT210918
release-notes, vendor-advisory
-
support.apple.com
/HT210921
release-notes, vendor-advisory
-
support.apple.com
/HT210920
release-notes, vendor-advisory
Sources
- CVE List CVE-2020-3856
- NVD CVE-2020-3856
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.