CVE-2021-30688
HIGHCVSS 8.8/10EPSS 0.28%
Last modified
CVE-2021-30688 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A malicious application may be able to break out of its sandbox. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
Description
A malicious application may be able to break out of its sandbox. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina. A path handling issue was addressed with improved validation.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Mac Os X | >= 10.15, <= 10.15.6 |
| Apple | Mac Os X | 10.15.7 |
| Apple | Macos | >= 11.0, < 11.4 |
References
- https://support.apple.com/en-us/HT212529Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212530Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212529Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212530Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30688?
A malicious application may be able to break out of its sandbox. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina. A path handling issue was addressed with improved validation.
How severe is CVE-2021-30688?
CVE-2021-30688 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30688?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-30688?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST