CVE-2026-3227
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.93%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- 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/M
- EPSS
- 1.93% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- tp-link/tl-wr802n firmware · tp-link/tl-wr841n firmware · tp-link/tl-wr840n firmware
- Source
- f23511db-6c3e-4e32-a477-6aa17d310630
References
- https://www.tp-link.com/en/support/download/tl-wr802n/v4/#FirmwareProduct
- https://www.tp-link.com/en/support/download/tl-wr840n/v6/#FirmwareProduct
- https://www.tp-link.com/en/support/download/tl-wr841n/v14/#FirmwareProduct
- https://www.tp-link.com/us/support/download/tl-wr802n/v4/#FirmwareProduct
- https://www.tp-link.com/us/support/download/tl-wr841n/v14/#FirmwareProduct
- https://www.tp-link.com/us/support/faq/5018/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.