CVE-2026-11409

Authenticated command execution via unsanitized PPPoE input

Published Jun 16, 2026 · Updated Jun 16, 2026

OS command injection in TP-Link TL-WR940N v6 before V6_260528 allows remote authenticated users to execute system commands. The IPv6 PPPoE configuration handler incorporates improperly sanitized user-supplied values into system command execution. Administrative web-interface access is required, and successful exploitation grants elevated command execution affecting device data, configuration, and availability.

CVSS severity8.5
High
EPSS probability2.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in TP-Link TL-WR940N v6 before V6_260528 allows remote authenticated users to execute system commands. The IPv6 PPPoE configuration handler incorporates improperly sanitized user-supplied values into system command execution. Administrative web-interface access is required, and successful exploitation grants elevated command execution affecting device data, configuration, and availability.

The record

CVE
CVE-2026-11409
Published
Jun 16, 2026
Updated
Jun 16, 2026
Vendor
TP-Link Systems Inc.
Product
TL-WR940N
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Jun 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V6_260528

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

TP-Link Systems Inc. · TL-WR940Nversion=0 <V6_260528

Published CVSS scores

8.5TP-Link Systems Inc.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
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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