High 8.5Published Mar 13, 2026

CVE-2026-3227Authenticated Command Injection on TP-Link TL-WR802N, TL-WR841N and TL-WR840N

Updated under an hour ago (Oct 26, 2026, 10:30 PM ET)

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It affects TP-Link Systems Inc. TL-WR802N v4 and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for TP-Link Systems Inc. TL-WR802N v4

Exploited in the last 30 days

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: 8.5 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: TPLink
NVD analysis: Analyzed
Record last updated: Jul 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TP-Link Systems Inc. TL-WR802N v4 tp_link_systems:tl_wr802n_v4 (from the name)	before V4_260304	CNA record
TP-Link Systems Inc. TL-WR841N v14 tp_link_systems:tl_wr841n_v14 (from the name)	before V14_260303	CNA record
TP Link Systems Inc. TL-WR840N v6 tp_link_systems:tl_wr840n_v6 (from the name)	before V6_260304	CNA record
tp-link tl-wr802n_firmware tp-link:tl-wr802n_firmware	before 260304	NVD
tp-link tl-wr841n_firmware tp-link:tl-wr841n_firmware	before 260303	NVD
tp-link tl-wr840n_firmware tp-link:tl-wr840n_firmware	before 260304	NVD

References

References

https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware	patch, product
https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware	patch, product
https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware	patch, product
https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware	patch, product
https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware	patch, product
https://www.tp-link.com/us/support/faq/5018/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.