CVE-2026-11409 PUBLISHED

OS Command Injection in IPv6 PPPoE Configuration in TP-Link TL-WR940N

Assigner: TPLink
Reserved: 05.06.2026 Published: 16.06.2026 Updated: 17.06.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS: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 Score: 8.5

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	TP-Link Systems Inc.
Product	TL-WR940N v6
Versions	Default: unaffected affected from 0 to V6_260528 (excl.)

Credits

Duong Ton Hoang Khang of Sacombank finder

References

Problem Types

CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') CWE

Impacts

CAPEC-88 OS Command Injection