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TI-2019-11869 Aliases CVE-2019-15800GHSA-wgw9-xjmw-x98v

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0.

Priority MEDIUM 49CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.

Summary

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.)

Why it matters now

EPSS 0.03872 90th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 18

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*before 2.50\(aahh.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*before 2.50\(aahi.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*before 2.50\(aazi.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*before 2.50\(aahj.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*before 2.50\(aahk.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aahh.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aahi.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aazi.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aahj.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aahk.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
Show 8 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*before 2.50\(aahl.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:*before 2.50\(aahm.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-24hp:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*before 2.50\(aahn.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:*before 2.50\(aaho.0\)c0VulnerableZyxel
cpe:2.3:h:zyxel:gs1900-48hp:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aahl.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aahm.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-24hp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aahn.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:* Versions before 2.50\(aaho.0\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:gs1900-48hp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-15800
  2. 2026-10-03 Alias added: GHSA-wgw9-xjmw-x98v
  3. 2026-10-14 EPSS moved to the 90th–95th percentile

References

Exploit 1

Advisory 1

  • TI-2026-06387 Stack-based buffer overflow in Zyxel GS1900-48HPv2 firmware KEVCVSS 3.1HIGH 8.8
  • TI-2016-01221 Cisco NX-OS 6.0(2)U6(1) through 6.0(2)U6(5) on Nexus 3000 devices and 6.0(2)A6(1) through… CVSS 3.0CRITICAL 9.8
  • TI-2015-05062 Belkin F9K1102 2 devices with firmware 2.10.17 rely on client-side JavaScript code for… CVSS 3.0CRITICAL 9.8
  • TI-2015-05061 The web management interface on Belkin F9K1102 2 devices with firmware 2.10.17 has a… CVSS 3.0CRITICAL 9.8
  • TI-2019-11872 An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. CVSS 3.1CRITICAL 9.1
  • TI-2019-11868 An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. CVSS 3.1HIGH 8.8
See all 34 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences