CVE-2026-11409: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in TP-Link Systems Inc. TL-WR940N v6
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.
AI Analysis
Technical Summary
An OS command injection vulnerability (CWE-78) exists in TP-Link TL-WR940N v6 specifically in the IPv6 PPPoE configuration handler. Due to improper neutralization of special elements in user input, an authenticated attacker with administrative access can execute arbitrary system commands with elevated privileges. The vulnerability is confirmed and published but lacks an official fix or patch at this time.
Potential Impact
An attacker with administrative access to the device can exploit this vulnerability to execute arbitrary system commands with elevated privileges, potentially compromising the device's integrity and control. This could lead to full device compromise or further network attacks depending on the attacker's objectives.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict administrative access to trusted users only and monitor for any suspicious activity related to IPv6 PPPoE configuration changes.
CVE-2026-11409: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in TP-Link Systems Inc. TL-WR940N v6
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 v4.0
Score 8.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An OS command injection vulnerability (CWE-78) exists in TP-Link TL-WR940N v6 specifically in the IPv6 PPPoE configuration handler. Due to improper neutralization of special elements in user input, an authenticated attacker with administrative access can execute arbitrary system commands with elevated privileges. The vulnerability is confirmed and published but lacks an official fix or patch at this time.
Potential Impact
An attacker with administrative access to the device can exploit this vulnerability to execute arbitrary system commands with elevated privileges, potentially compromising the device's integrity and control. This could lead to full device compromise or further network attacks depending on the attacker's objectives.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict administrative access to trusted users only and monitor for any suspicious activity related to IPv6 PPPoE configuration changes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-06-05T18:37:11.242Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a31c79b0b89be68883759a4
Added to database: 06/16/2026, 22:00:59 UTC
Last enriched: 06/24/2026, 15:53:59 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 71
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