CVE-2026-3227
Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N
Description
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.
INFO
Published Date :
March 16, 2026, 2:19 p.m.
Last Modified :
April 7, 2026, 1:07 a.m.
Remotely Exploit :
No
Source :
f23511db-6c3e-4e32-a477-6aa17d310630
Affected Products
The following products are affected by CVE-2026-3227
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | f23511db-6c3e-4e32-a477-6aa17d310630 | ||||
| CVSS 4.0 | HIGH | f23511db-6c3e-4e32-a477-6aa17d310630 |
Solution
- Update router firmware to the latest version.
- Avoid uploading untrusted configuration files.
- Review router security configurations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3227.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3227 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3227
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3227 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3227 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration AND OR *cpe:2.3:o:tp-link:tl-wr802n_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 260304 OR cpe:2.3:h:tp-link:tl-wr802n:v4:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:tp-link:tl-wr841n_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 260303 OR cpe:2.3:h:tp-link:tl-wr841n:14:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:tp-link:tl-wr840n_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 260304 OR cpe:2.3:h:tp-link:tl-wr840n:6:*:*:*:*:*:*:* Added Reference Type TPLink: https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware Types: Product Added Reference Type TPLink: https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware Types: Product Added Reference Type TPLink: https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware Types: Product Added Reference Type TPLink: https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware Types: Product Added Reference Type TPLink: https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware Types: Product Added Reference Type TPLink: https://www.tp-link.com/us/support/faq/5018/ Types: Vendor Advisory -
New CVE Received by f23511db-6c3e-4e32-a477-6aa17d310630
Mar. 16, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 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 Added CWE CWE-78 Added Reference https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware Added Reference https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware Added Reference https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware Added Reference https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware Added Reference https://www.tp-link.com/us/support/faq/5018/