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CVE-2026-12001

Hardcoded Credential Vulnerability in Multiple TP-Link Router Models

MEDIUM
5.2
CVSS Score
Published: July 27, 2026 at 08:08 PM UTC
Updated: August 11, 2026 at 09:17 PM UTC
5 products affected across 1 vendorArcher C20TL-WR902ACTL-WR845N

Using TL-WR850N v3 by TP-Link Systems Inc.?

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Severity
MEDIUM5.2
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

A hardcoded credential vulnerability exists in the firmware of multiple TP-Link routers (TL-WR845N v4, TL-WR850N v3, 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Archer C20· TP-Link
60%
v < Archer C20(US)_V6_250630
Affected range stops below Archer C20(US)_V6_250630, so it looks safe — our inference, not a vendor statement
Archer MR200· TP-Link
60%
v < EU_V5.20_1.3.0 Build 260319
Affected range stops below EU_V5.20_1.3.0 Build 260319, so it looks safe — our inference, not a vendor statement
TL-WR845N· TP-Link
60%
v < TL-WR845N(UN)_V4_250401
Affected range stops below TL-WR845N(UN)_V4_250401, so it looks safe — our inference, not a vendor statement
TL-WR850N· TP-Link
60%
v < TL-WR850N(IN)_V3.48_3.16.0 Build 260422_2048
Affected range stops below TL-WR850N(IN)_V3.48_3.16.0 Build 260422_2048, so it looks safe — our inference, not a vendor statement
TL-WR902AC· TP-Link
60%
v < EU_V4_0.9.3 Build 260728v < US_V4_0.9.1 Build 260810
Affected range stops below EU_V4_0.9.3 Build 260728, so it looks safe — our inference, not a vendor statement
Affected range stops below US_V4_0.9.1 Build 260810, so it looks safe — our inference, not a vendor statement

References (11)

Patch
Source: cverecord
https://www.tp-link.com/en/support/download/archer-mr200/v5/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/in/support/download/archer-mr200/v5/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/en/support/download/archer-c20/v6/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/us/support/download/archer-c20/v6/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/in/support/download/archer-c20/v6/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/en/support/download/tl-wr845n/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/in/support/download/tl-wr845n/#Firmware
Patch
Source: cverecord
https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.2MEDIUMTPLink
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-798

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