CVE-2026-3227

Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N

8.5 HighPublic exploit

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authenticated attacker to upload a crafted configuration file that results in execution of OS commands with root privileges during port-trigger processing.
Successful exploitation allows an authenticated attacker to execute system commands with root privileges, leading to full device compromise.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

3.03%Up 2.6 points since Mar 14, 2026

What each source reports

CVE List Score used 8.5

Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N

Record: CVE-2026-3227
CVSS 4.0: 8.5 HighCVSS: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-78
Updated: 2026-11-02

EUVDEUVD-2026-12171 8.5

Record: EUVD-2026-12171
CVSS 4.0: 8.5 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-7vvh-gmhq-282v 8.5

A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL...

Record: GHSA-7vvh-gmhq-282v
CVSS 4.0: 8.5 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

NVD 8.5

Record: CVE-2026-3227
CVSS 4.0: 8.5 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 6.8 MediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	do4choo/CVE-2026-3227-TP-Link-authenticated-RCE	2026-06-25

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-3227 is a high vulnerability (CVSS 8.5) in Tp Link Systems Inc. Tl-wr840n V6, published March 13, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.03%, the 87th percentile. No source names a fixed version.