CVE-2020-24355
9.8 · CRITICALOverview
CVE-2020-24355 is a critical-severity vulnerability affecting zyxel vmg5313-b30b_firmware. It was published on September 2, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Zyxel VMG5313-B30B router on firmware 5.13(ABCJ.6)b3_1127, and possibly older versions of firmware are affected by insecure permissions which allows regular and other users to create new users with elevated privileges. This is done by changing "FirstIndex" field in JSON that is POST-ed during account creation. Similar may also be possible with account deletion.
Remediation
Check the references section for vendor advisories and patches from zyxel. Update vmg5313-b30b_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 |
|---|---|---|---|
| zyxel | vmg5313-b30b_firmware | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2020-24355?
CVE-2020-24355 is a critical-severity vulnerability affecting zyxel vmg5313-b30b_firmware. It was published on September 2, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2020-24355?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-24355?
Check the references section for vendor advisories and patches from zyxel. Update vmg5313-b30b_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-2020-24355?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-24355 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
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