CVE-2023-6397
6.5 · MEDIUMOverview
CVE-2023-6397 is a medium-severity vulnerability affecting zyxel atp100_firmware. It was published on February 20, 2024 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 requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
A null pointer dereference vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1 and USG FLEX series firmware versions from 4.50 through 5.37 Patch 1 could allow a LAN-based attacker to cause denial-of-service (DoS) conditions by downloading a crafted RAR compressed file onto a LAN-side host if the firewall has the “Anti-Malware” feature enabled.
Remediation
Check the references section for vendor advisories and patches from zyxel. Update atp100_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 | atp100_firmware | >= 4.32, < 5.37 | Affected |
| zyxel | atp100w_firmware | >= 4.32, < 5.37 | Affected |
| zyxel | atp200_firmware | >= 4.32, < 5.37 | Affected |
| zyxel | atp500_firmware | >= 4.32, < 5.37 | Affected |
| zyxel | atp700_firmware | >= 4.32, < 5.37 | Affected |
| zyxel | atp800_firmware | >= 4.32, < 5.37 | Affected |
| zyxel | usg_flex_100_firmware | >= 4.50, < 5.37 | Affected |
| zyxel | usg_flex_100ax_firmware | >= 4.50, < 5.37 | Affected |
| zyxel | usg_flex_100h_firmware | >= 4.50, < 5.37 | Affected |
| zyxel | usg_flex_100w_firmware | >= 4.50, < 5.37 | Affected |
Frequently Asked Questions
What is CVE-2023-6397?
CVE-2023-6397 is a medium-severity vulnerability affecting zyxel atp100_firmware. It was published on February 20, 2024 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2023-6397?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-6397?
Check the references section for vendor advisories and patches from zyxel. Update atp100_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-2023-6397?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-6397 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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