High severity · published Jun 16, 2026
CVE-2026-11409
OS Command Injection in IPv6 PPPoE Configuration in TP-Link TL-WR940N
7.2
CVSS
2.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.8% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TV
TL-WR940N v6 · TP-Link Systems Inc.
before V6_260528 · source: vendor
TF
Tl-wr940n Firmware · Tp-link
before 260528 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11409
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-11409
Product
https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware
Product
https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware
Vendor Advisory
https://www.tp-link.com/us/support/faq/5131/
More from TL-WR940N v6
8.7
CVE-2026-12935
Unauthenticated Remote Code Execution in TP-Link TL-WR940N RTSP Conntrack Feature
7.2
CVE-2026-11410
OS Command Injection in BigPond Cable (BPA) Configuration in TP-Link TL-WR940N