CVE-2021-1799
6.5 · MEDIUMOverview
CVE-2021-1799 is a medium-severity vulnerability affecting apple safari. It was published on April 2, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A port redirection issue was addressed with additional port validation. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. A malicious website may be able to access restricted ports on arbitrary servers.
Remediation
Check the references section for vendor advisories and patches from apple. Update safari to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| apple | safari | >= 0, < 14.0.3 | Affected |
| apple | ipad_os | >= 0, < 14.4 | Affected |
| apple | iphone_os | >= 0, < 14.4 | Affected |
| apple | macos | >= 11.0.1, < 11.2 | Affected |
| apple | tvos | >= 0, < 14.4 | Affected |
| apple | watchos | >= 0, < 7.3 | Affected |
| webkitgtk | webkitgtk | >= 0, < 2.30.6 | Affected |
References
Frequently Asked Questions
What is CVE-2021-1799?
CVE-2021-1799 is a medium-severity vulnerability affecting apple safari. It was published on April 2, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2021-1799?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-1799?
Check the references section for vendor advisories and patches from apple. Update safari to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-1799?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-1799 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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