CVE-2021-30655
CRITICALCVSS 9.8/10EPSS 2.22%
Last modified
CVE-2021-30655 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An application may be able to execute arbitrary code with system privileges. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. EPSS estimates a 2.22% chance of exploitation in the next 30 days.
Description
An application may be able to execute arbitrary code with system privileges. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. The issue was addressed with improved permissions logic.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Mac Os X | >= 10.15, <= 10.15.5 |
| Apple | Mac Os X | 10.15.6 |
| Apple | Mac Os X | 10.15.7 |
| Apple | Macos | >= 11.0, < 11.3 |
References
- https://support.apple.com/en-us/HT212325Vendor Advisory
- https://support.apple.com/en-us/HT212326Vendor Advisory
- https://support.apple.com/en-us/HT212325Vendor Advisory
- https://support.apple.com/en-us/HT212326Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30655?
An application may be able to execute arbitrary code with system privileges. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. The issue was addressed with improved permissions logic.
How severe is CVE-2021-30655?
CVE-2021-30655 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.22% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30655?
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.
Related CVEs from 2021
- CVE-2021-30648The Symantec Advanced Secure Gateway (ASG) and ProxySG web m…9.8
- CVE-2021-30650A reflected cross-site scripting (XSS) vulnerability in the …6.1
- CVE-2021-30651A malicious authenticated SMG administrator user can obtain …4.9
- CVE-2021-30652A race condition was addressed with additional validation. T…7
- CVE-2021-30653This issue was addressed with improved checks. This issue is…7.8
- CVE-2021-30654This issue was addressed by removing additional entitlements…5.5
- CVE-2021-30656An access issue was addressed with improved memory managemen…5.5
- CVE-2021-30657A logic issue was addressed with improved state management. …5.5
- CVE-2021-30658This issue was addressed with improved handling of file meta…5.5
- CVE-2021-30659A validation issue was addressed with improved logic. This i…6.5
- CVE-2021-30660An out-of-bounds read was addressed with improved bounds che…7.5
- CVE-2021-30661A use after free issue was addressed with improved memory ma…8.8
Are you affected by CVE-2021-30655?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST