CVE-2019-15800

CRITICAL
9.8
CVSS Score
Published: November 14, 2019 at 08:16 PM UTC
Updated: June 17, 2026 at 02:21 AM UTC
18 products affected across 1 vendorGS1900-10HP firmwareGS1900-24 firmwareGS1900-8 Firmware

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Severity
CRITICAL9.8
Exploit prediction
EPSS 4%

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.)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.50(aazi.0)c0
Affected range stops below 2.50(aazi.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-10hp (same device)
v < 2.50(aahj.0)c0
Affected range stops below 2.50(aahj.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-16 (same device)
v < 2.50(aahl.0)c0
Affected range stops below 2.50(aahl.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-24 (same device)
v < 2.50(aahk.0)c0
Affected range stops below 2.50(aahk.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-24e (same device)
v < 2.50(aahm.0)c0
Affected range stops below 2.50(aahm.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-24hp (same device)
v < 2.50(aahn.0)c0
Affected range stops below 2.50(aahn.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-48 (same device)
v < 2.50(aaho.0)c0
Affected range stops below 2.50(aaho.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-48hp (same device)
v < 2.50(aahh.0)c0
Affected range stops below 2.50(aahh.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-8 (same device)
v < 2.50(aahi.0)c0
Affected range stops below 2.50(aahi.0)c0, so it looks safe — our inference, not a vendor statement
zyxel-gs1900-8hp (same device)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-78

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