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TI-2026-09846 Aliases CVE-2026-11409GHSA-xwmq-379c-mhf5

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

Priority MEDIUM 44CWE-78Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02787 86th percentileScored 2026-11-07
Fix Fixed TL-WR940N v6 (TP-Link Systems Inc.): V6_260528

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TP-LinkTL-WR940N v6before V6_260528V6_260528Patch availableCNA
  • TL-WR940N v6 VendorTP-Link Affected before V6_260528 Fixed in V6_260528 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tp-link:tl-wr940n_firmware:*:*:*:*:*:*:*:*before 260528VulnerableTP-Link
cpe:2.3:h:tp-link:tl-wr940n:v6:*:*:*:*:*:*:*v6Running onTP-Link
  • cpe:2.3:o:tp-link:tl-wr940n_firmware:*:*:*:*:*:*:*:* Versions before 260528 Vulnerable ·TP-Link
  • cpe:2.3:h:tp-link:tl-wr940n:v6:*:*:*:*:*:*:* Versions v6 Running on ·TP-Link

Remediation

  • Fix · CNA TL-WR940N v6 (TP-Link Systems Inc.) Fixed in V6_260528

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    TP-Link Systems TL-WR940N v6 — tp-link.com/us/support/faq/5131

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-09847 OS Command Injection in BigPond Cable (BPA) Configuration in TP-Link TL-WR940NPriority MEDIUM 44
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11409
  2. 2026-10-03 Alias added: GHSA-xwmq-379c-mhf5

References

Patch 2

Advisory 1

  • TI-2023-16571 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… KEVCVSS 3.1HIGH 8.8
  • TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
  • TI-2025-05561 TP-Link TL-WR940N, TL-WR841N WanSlaacCfgRpm.htm buffer overflow CVSS 4.0HIGH 8.2
  • TI-2023-18224 TP-Link TL-WR940N V4 was discovered to contain a buffer overflow via the ipStart… CVSS 3.1CRITICAL 9.9
  • TI-2019-04924 TP-Link TL-WR940N is vulnerable to a stack-based buffer overflow, caused by improper… CVSS 3.0HIGH 8.8
  • TI-2024-36696 TP-Link TL-WR940N V3 and V4 with firmware 3.16.9 and earlier contain a buffer overflow… CVSS 3.1HIGH 8.0
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences