CVE-2026-11409

An authenticated OS command injection vulnerability exists in the IPv6 PPPoE configuration handler in TL-WR940N v6 due to improper sanitization of user input. An attacker with administrative access may exploit this issue to execute arbitrary system commands with elevated privileges.

CVSS 4.0

8.5CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

2.8% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-10-25)

CWE

CWE-78

Published

2026-06-17

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• tp-link:tl-wr940n_firmware

References

• https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware
• https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware
• https://www.tp-link.com/us/support/faq/5131/

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