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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.

PUBLISHED Reserved 2026-02-25 | Published 2026-03-13 | Updated 2026-03-13 | Assigner TPLink




HIGH: 8.5CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

Default status
unaffected

Any version before V4_260304
affected

Default status
unaffected

Any version before V14_260303
affected

Default status
unaffected

Any version before V6_260304
affected

References

www.tp-link.com/en/support/download/tl-wr802n/v4/ patch

www.tp-link.com/us/support/download/tl-wr802n/v4/ patch

www.tp-link.com/en/support/download/tl-wr841n/v14/ patch

www.tp-link.com/us/support/download/tl-wr841n/v14/ patch

www.tp-link.com/en/support/download/tl-wr840n/v6/ patch

www.tp-link.com/us/support/faq/5018/ vendor-advisory

cve.org (CVE-2026-3227)

nvd.nist.gov (CVE-2026-3227)

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