CVE-2019-15800
9.8 · CRITICALOverview
CVE-2019-15800 is a critical-severity vulnerability affecting zyxel gs1900-8_firmware. It was published on November 14, 2019 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
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Due to lack of input validation in the cmd_sys_traceroute_exec(), cmd_sys_arp_clear(), and cmd_sys_ping_exec() functions in the libclicmd.so library contained in the firmware, an attacker could leverage these functions to call system() and execute arbitrary commands on the switches. (Note that these functions are currently not called in this version of the firmware, however an attacker could use other vulnerabilities to finally use these vulnerabilities to gain code execution.)
Remediation
Check the references section for vendor advisories and patches from zyxel. Update gs1900-8_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 | gs1900-8_firmware | >= 0, < 2.50\(aahh.0\)c0 | Affected |
| zyxel | gs1900-8hp_firmware | >= 0, < 2.50\(aahi.0\)c0 | Affected |
| zyxel | gs1900-10hp_firmware | >= 0, < 2.50\(aazi.0\)c0 | Affected |
| zyxel | gs1900-16_firmware | >= 0, < 2.50\(aahj.0\)c0 | Affected |
| zyxel | gs1900-24e_firmware | >= 0, < 2.50\(aahk.0\)c0 | Affected |
| zyxel | gs1900-24_firmware | >= 0, < 2.50\(aahl.0\)c0 | Affected |
| zyxel | gs1900-24hp_firmware | >= 0, < 2.50\(aahm.0\)c0 | Affected |
| zyxel | gs1900-48_firmware | >= 0, < 2.50\(aahn.0\)c0 | Affected |
| zyxel | gs1900-48hp_firmware | >= 0, < 2.50\(aaho.0\)c0 | Affected |
Frequently Asked Questions
What is CVE-2019-15800?
CVE-2019-15800 is a critical-severity vulnerability affecting zyxel gs1900-8_firmware. It was published on November 14, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2019-15800?
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-2019-15800?
Check the references section for vendor advisories and patches from zyxel. Update gs1900-8_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-2019-15800?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-15800 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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