CVE-2021-1757
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security...
- Published
- Apr 2, 2021
- Updated
- Aug 3, 2024
- Assigning CNA
- apple
- Evidence observed
- Aug 14, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 26.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
An out-of-bounds read 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. A local attacker may be able to elevate their privileges.
Sources
1- n-daysPoC
Curated collection of iOS kernel and userland exploit PoCs and writeups for in-the-wild and researched CVEs, including binary-diffed vulnerability analyses.
Responsible use
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