CVE-2021-27420
5.3 · MEDIUMOverview
CVE-2021-27420 is a medium-severity vulnerability affecting ge multilin_b30_firmware. It was published on March 23, 2022 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
GE UR firmware versions prior to version 8.1x web server task does not properly handle receipt of unsupported HTTP verbs, resulting in the web server becoming temporarily unresponsive after receiving a series of unsupported HTTP requests. When unresponsive, the web server is inaccessible. By itself, this is not particularly significant as the relay remains effective in all other functionality and communication channels.
Remediation
Check the references section for vendor advisories and patches from ge. Update multilin_b30_firmware 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 |
|---|---|---|---|
| ge | multilin_b30_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_b90_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_c60_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_c70_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_c95_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_d30_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_d60_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_f35_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_f60_firmware | >= 0, < 8.10 | Affected |
| ge | multilin_g30_firmware | >= 0, < 8.10 | Affected |
Frequently Asked Questions
What is CVE-2021-27420?
CVE-2021-27420 is a medium-severity vulnerability affecting ge multilin_b30_firmware. It was published on March 23, 2022 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2021-27420?
This vulnerability has a CVSS 3.1 base score of 5.3, 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-2021-27420?
Check the references section for vendor advisories and patches from ge. Update multilin_b30_firmware 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-2021-27420?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-27420 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.
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