Vulnerability Database

322,907

Total vulnerabilities in the database

CVE-2021-41653

The PING function on the TP-Link TL-WR840N EU v5 router with firmware through TL-WR840N(EU)_V5_171211 is vulnerable to remote code execution via a crafted payload in an IP address input field.

  • Published: Nov 13, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-41653
  • 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:

Software From Fixed in
tp-link / tl-wr840n_firmware - tl-wr840n\(eu\)_v5_171211.x