CVE-2026-3227
TP-Link · published 2026-03-16
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by TPLink via the CVE Program.
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.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| TP-Link Systems Inc. | TL-WR802N v4 | 0 – before V4_260304: affected |
| TP-Link Systems Inc. | TL-WR841N v14 | 0 – before V14_260303: affected |
| TP Link Systems Inc. | TL-WR840N v6 | 0 – before V6_260304: affected |
Products named in NVD's CPE match criteria (3)
cpe:2.3:o:tp-link:tl-wr802n_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:tp-link:tl-wr841n_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:tp-link:tl-wr840n_firmware:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 8.5 HIGH — as published by TPLink (Secondary)
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/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 MEDIUM — as published by NIST (Primary)
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: poc · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware
- https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware
- https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware
- https://www.tp-link.com/us/support/faq/5018/
Source dates: published 2026-03-16, last changed 2026-07-01. DeSpy's copy of this version is dated 2026-09-28.
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