CVE-2021-30676
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur...
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. A local user may be able to cause unexpected system termination or read kernel memory.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. A local user may be able to cause unexpected system termination or read kernel memory.
- Record
CVE-2021-30676- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - CVSS 2.0
- 6.6 Medium
AV:L/AC:L/Au:N/C:C/I:N/A:C - Updated
- 2026-11-02
CVE ListNo score
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. A local user may be able to cause unexpected system termination or read kernel memory.
- Record
CVE-2021-30676- Updated
- 2026-11-02
EUVDEUVD-2021-17593No score
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. A local user may be able to cause unexpected system termination or read kernel memory.
- Record
EUVD-2021-17593- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5gpp-vqxm-hc58No score
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur...
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. A local user may be able to cause unexpected system termination or read kernel memory.
- Record
GHSA-5gpp-vqxm-hc58- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-30676 is a high vulnerability (CVSS 7.1) in Apple Macos, published September 8, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.