CVE-2021-1778 json
An out-of-bounds read issue existed in the curl.
published 2021-04-02 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7242
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
An out-of-bounds read issue existed in the curl. This issue was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. Processing a maliciously crafted image may lead to a denial of service.
Patch / fix
- Apple iOS and iPadOS 14.4
- Apple macOS 7.3, 11.2, 14.4
Exploit prediction
0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Affected products
- Apple iOS and iPadOS
- Apple macOS
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/en-us/HT212147
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212146
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212148
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT212149
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-1778
- NVD CVE-2021-1778
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.