Vulnerability Database

322,904

Total vulnerabilities in the database

CVE-2020-36178

oal_ipt_addBridgeIsolationRules on TP-Link TL-WR840N 6_EU_0.9.1_4.16 devices allows OS command injection because a raw string entered from the web interface (an IP address field) is used directly for a call to the system library function (for iptables). NOTE: oal_ipt_addBridgeIsolationRules is not the only function that calls util_execSystem.

  • Published: Jan 6, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2020-36178
  • Severity: Critical
  • Exploit:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 10
  • AV:N/AC:L/Au:N/C:C/I:C/A:C

CWEs:

OWASP TOP 10:

Software From Fixed in
tp-link / tl-wr840n_firmware 6_eu_0.9.1_4.16 6_eu_0.9.1_4.16.x