High 8.5Published Jun 16, 2026

CVE-2026-11409OS Command Injection in IPv6 PPPoE Configuration in TP-Link TL-WR940N

Updated under an hour ago (Oct 26, 2026, 2:50 PM ET)

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It affects TP-Link Systems Inc. TL-WR940N v6 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for TP-Link Systems Inc. TL-WR940N v6

Exploited in the last 30 days

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: 8.5 HIGH (v4.0, 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
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: TPLink
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TP-Link Systems Inc. TL-WR940N v6 tp_link_systems:tl_wr940n_v6 (from the name)	before V6_260528	CNA record
tp-link tl-wr940n_firmware tp-link:tl-wr940n_firmware	before 260528	NVD

References

References

https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware	patch, product
https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware	patch, product
https://www.tp-link.com/us/support/faq/5131/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.