CVE-2026-3227
Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N
HIGH 8.5EPSS 1.9%
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.
- Affected
- TP-Link Systems Inc. · TP Link Systems Inc. · TL-WR802N v4 · TL-WR841N v14 · TL-WR840N v6
- CVSS v4.0 CNA
- 8.5 HIGH
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 v3.1 NVD
- 6.8 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - EPSS
- 1.88% chance of exploitation in the next 30 days, 79th percentile
- Published
- 2026-03-13
- Updated
- 2026-07-01
Proof-of-concept exploits (1)
- do4choo/CVE-2026-3227-TP-Link-authenticated-RCE43★ · 2026-06-25
Security advisories
- https://www.tp-link.com/us/support/faq/5018
- 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