CVE-2026-11409 | An authenticated OS command injection vulnerability exists i… | CVSS 8.5 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-11409
State: PUBLISHED
Assigner: TPLink
Reserved: 2026-06-05 18:37 UTC
Published: 2026-06-16 21:03 UTC
Last updated: 2026-06-17 14:35 UTC
Primary CWE: CWE-78
CWE-78 Improper neutralization of special elements used in a…
Vendor / Product: TP-Link Systems Inc. / TL-WR940N v6
Sources: cve.org · NVD

Severity & Metrics

8.5 HIGH CVSS 4.0

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
TP-Link Systems Inc.	TL-WR940N v6	—	0 < V6_260528

Weakness (CWE)

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

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.5	HIGH	4.0	cna	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

References (3)