Description
A hardcoded credential vulnerability exists in the firmware of multiple TP-Link routers (TL-WR845N v4, TL-WR850N v3, TL-WR902AC v4, Archer C20 v6 & Archer MR200 v5). Authentication-related credential material is embedded within a password file in the firmware image and may be recovered through firmware analysis. Successful exploitation could result in unauthorized access to privileged functions on affected devices.
References10
- www.tp-link.com/en/support/download/archer-c20/v6/#Firmware
- www.tp-link.com/en/support/download/archer-mr200/v5/#Firmware
- www.tp-link.com/en/support/download/tl-wr845n/#Firmware
- www.tp-link.com/en/support/download/tl-wr902ac/v4/#Firmware
- www.tp-link.com/in/support/download/archer-c20/v6/#Firmware
- www.tp-link.com/in/support/download/archer-mr200/v5/#Firmware
- www.tp-link.com/in/support/download/tl-wr845n/#Firmware
- www.tp-link.com/in/support/download/tl-wr850n/#Firmware
- www.tp-link.com/us/support/download/archer-c20/v6/#Firmware
- www.tp-link.com/us/support/download/tl-wr902ac/v4/#Firmware
Metrics
- CVSS 4.0
-
5.2
MEDIUM
Score source: CNA
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 28 · as of 13 November 2026
- CWE
- CWE-798
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.