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CVE-2026-12001— Hardcoded Credential Vulnerability in Multiple TP-Link Router Models

Quick assessment

Affected
TP-Link Systems Inc. TL-WR850N v3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-Link tl-wr845n是中国TP-Link公司的一款无线宽带路由器。 TP-Link TL-WR845N v4版本、TL-WR850N v3版本、Archer C20 v6版本和Archer MR200 v5版本存在信任管理问题漏洞，该漏洞源于固件中存在硬编码凭证，可能导致未授权访问受影响设备上的特权功能。

CVSS 5.2 · Medium EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys

Affected Version Matrix 6

VendorProduct Version RangeStatus
TP Link Systems Inc. TL-WR845N v4 < TL-WR845N(UN)_V4_250401 affected
TP Link Systems Inc. TL-WR902AC v4 < US_V4_0.9.1 Build 260810 affected
< EU_V4_0.9.3 Build 260728 affected
TP-Link Systems Inc. Archer C20 v6 < Archer C20(US)_V6_250630 affected
TP-Link Systems Inc. Archer MR200 v5 < EU_V5.20_1.3.0 Build 260319 affected
TP-Link Systems Inc. TL-WR850N v3 < TL-WR850N(IN)_V3.48_3.16.0 Build 260422_2048 affected
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I. Basic Information for CVE-2026-12001

Vulnerability Information
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Vulnerability Title
Hardcoded Credential Vulnerability in Multiple TP-Link Router Models
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的凭证
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link TL-WR845N 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link tl-wr845n是中国TP-Link公司的一款无线宽带路由器。 TP-Link TL-WR845N v4版本、TL-WR850N v3版本、Archer C20 v6版本和Archer MR200 v5版本存在信任管理问题漏洞，该漏洞源于固件中存在硬编码凭证，可能导致未授权访问受影响设备上的特权功能。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. TL-WR850N v3 0 ~ TL-WR850N(IN)_V3.48_3.16.0 Build 260422_2048 -
TP-Link Systems Inc. Archer C20 v6 0 ~ Archer C20(US)_V6_250630 -
TP Link Systems Inc. TL-WR845N v4 0 ~ TL-WR845N(UN)_V4_250401 -
TP-Link Systems Inc. Archer MR200 v5 0 ~ EU_V5.20_1.3.0 Build 260319 -
TP Link Systems Inc. TL-WR902AC v4 0 ~ US_V4_0.9.1 Build 260810 -

II. Public POCs for CVE-2026-12001

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III. Intelligence Information for CVE-2026-12001

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Vendor Advisories for CVE-2026-12001 (1)

Vendor Pages for CVE-2026-12001 (4)

IV. Related Vulnerabilities

Same product: TL-WR850N v3
Same vendor: TP-Link Systems Inc.
Same weakness: CWE-798

V. Comments for CVE-2026-12001

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