Description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 80 by default. When parsing the Host request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length static buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-8457.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| TP-Link | TL-WR841N | 0.9.1 4.16 v007c.0 Build 180613 Rel.42415n | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 2 repositories
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imnot-ye/CVE-2019-17147 ★ 4 · Jun 9, 2025
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DrmnSamoLiu/CVE-2019-17147_Practice_Material ★ 4 · Jan 16, 2022
This repo contains dumped flash partitions with firmware version vulnerable to CVE-2019-17147, and some useful binaries to downgrade and debug your WR841N router.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.