CVE-2021-44273
7.4 · HIGHOverview
CVE-2021-44273 is a high-severity vulnerability affecting e2bn e2guardian. It was published on December 23, 2021 and has a CVSS 3.1 base score of 7.4 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
e2guardian v5.4.x <= v5.4.3r is affected by missing SSL certificate validation in the SSL MITM engine. In standalone mode (i.e., acting as a proxy or a transparent proxy), with SSL MITM enabled, e2guardian, if built with OpenSSL v1.1.x, did not validate hostnames in certificates of the web servers that it connected to, and thus was itself vulnerable to MITM attacks.
Remediation
Check the references section for vendor advisories and patches from e2bn. Update e2guardian 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 |
|---|---|---|---|
| e2bn | e2guardian | 5.4.0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-44273?
CVE-2021-44273 is a high-severity vulnerability affecting e2bn e2guardian. It was published on December 23, 2021 and has a CVSS 3.1 base score of 7.4 (HIGH).
How severe is CVE-2021-44273?
This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-44273?
Check the references section for vendor advisories and patches from e2bn. Update e2guardian 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-2021-44273?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-44273 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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