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Vulnerability record · CVE-2026-3227 · published 16 March 2026

CVE-2026-3227: Tp-link tl-wr802n firmware os command injection vulnerability

Tp Link · Tl Wr802n Firmware

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.

8.5 CVSS 4.0 High EPSS 1.8% · top 22.5% CWE-78 · OS command injection
8.5CVSS 4.0 base score
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
1 Jul 2026Last modified by NVD

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/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:

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.tp-link.com/en/support/download/tl-wr802n/v4/#Firmware Product
https://www.tp-link.com/en/support/download/tl-wr840n/v6/#Firmware Product
https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware Product
https://www.tp-link.com/us/support/download/tl-wr802n/v4/#Firmware Product
https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware Product
https://www.tp-link.com/us/support/faq/5018/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-33538TP-Link router web interface command injection in WlanNetworkRpmTP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 contain a command injection flaw in the /userRpm/WlanNetworkRpm component of the route…KEVEPSS 42%analysed8.6CVE-2025-9377TP-Link Archer C7 and TL-WR841N Parental Control OS Command InjectionAn OS command injection flaw (CWE-78) exists in the Parental Control page of TP-Link Archer C7(EU) V2 and TL-WR841N/ND(MS) V9 routers, allowing an au…KEVEPSS 34%analysed7.5CVE-2015-3035TP-Link router directory traversal allows unauthenticated file readA path traversal flaw in the web interface of multiple TP-Link Archer and TL-WR/WDR router models lets a remote attacker read arbitrary files by plac…KEVEPSS 84%analysed6.5CVE-2023-50224TP-Link router httpd authentication bypass exposes stored credentialsThe httpd service on affected TP-Link router firmware contains an improper authentication flaw (CWE-290) that lets a network-adjacent attacker bypass…KEVEPSS 16%analysed9.8CVE-2022-25060Tp-link tl-wr840n firmware os command injection vulnerabilityTP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a command injection vulnerability via the component oal_startPing.EPSS 40%9.8CVE-2022-25061TP-Link TL-WR840N router command injection in oal_setIp6DefaultRouteThe TP-Link TL-WR840N(ES) V6.20 firmware (build 180709) contains an OS command injection flaw in the oal_setIp6DefaultRoute component. Because the fl…EPSS 59%analysed9.8CVE-2022-25064Tp-link tl-wr840n firmware os command injection vulnerabilityTP-LINK TL-WR840N(ES)_V6.20_180709 was discovered to contain a remote code execution (RCE) vulnerability via the function oal_wan6_setIpAddr.EPSS 36%9.8CVE-2022-25073Tp-link tl-wr841n firmware out-of-bounds write vulnerabilityTL-WR841Nv14_US_0.9.1_4.18 routers were discovered to contain a stack overflow in the function dm_fillObjByStr(). This vulnerability allows unauthent…EPSS 13%

Source: NIST National Vulnerability Database (record CVE-2026-3227), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.