CVE-2021-30753 json
Processing a maliciously crafted font may result in the disclosure of process memory.
published 2021-09-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17670
- cvss
- 5.5
- 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
Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. An out-of-bounds read was addressed with improved input validation.
Patch / fix
- Apple iOS and iPadOS 14.6
- Apple macOS 7.5, 11.4, 14.6
Exploit prediction
0.91% 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 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Affected products
- Apple iOS and iPadOS
- Apple macOS
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/en-us/HT212528
vendor-advisory
-
support.apple.com
/en-us/HT212529
vendor-advisory
-
support.apple.com
/en-us/HT212532
vendor-advisory
-
support.apple.com
/en-us/HT212533
vendor-advisory
Sources
- CVE List CVE-2021-30753
- NVD CVE-2021-30753
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.