High severity7.8NVD Advisory· Published Sep 8, 2021· Updated Jun 17, 2026
CVE-2021-30726
CVE-2021-30726
Description
A malicious application may be able to execute arbitrary code with kernel privileges. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. An out-of-bounds write issue was addressed with improved bounds checking.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2= Big Sur 11.4 / Security Update 2021-003 Catalina / Security Update 2021-004 Mojave+ 1 more
- (no CPE)range: = Big Sur 11.4 / Security Update 2021-003 Catalina / Security Update 2021-004 Mojave
- (no CPE)range: unspecified
Patches
Vulnerability mechanics
References
3- support.apple.com/en-us/HT212529nvdVendor Advisory
- support.apple.com/en-us/HT212530nvdVendor Advisory
- support.apple.com/en-us/HT212531nvdVendor Advisory
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