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Fencer Intel
medium 5.2

CVE-2026-12001 json

Hardcoded Credential Vulnerability in Multiple TP-Link Router Models

published 3mo ago modified 2mo ago also EUVD-2026-49587

cvss
5.2
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Patch / fix

  • TP-Link Systems Inc. TL-WR850N v3 TL-WR850N(IN)_V3.48_3.16.0 Build 260422_2048
  • TP-Link Systems Inc. Archer C20 v6 Archer C20(US)_V6_250630
  • TP Link Systems Inc. TL-WR845N v4 TL-WR845N(UN)_V4_250401
  • TP-Link Systems Inc. Archer MR200 v5 EU_V5.20_1.3.0 Build 260319
  • TP Link Systems Inc. TL-WR902AC v4 EU_V4_0.9.3 Build 260728, US_V4_0.9.1 Build 260810

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 5.2 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
CNA 4.0 5.2 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

Affected products

  • TP-Link Systems Inc. TL-WR850N v3
  • TP-Link Systems Inc. Archer C20 v6
  • TP Link Systems Inc. TL-WR845N v4
  • TP-Link Systems Inc. Archer MR200 v5
  • TP Link Systems Inc. TL-WR902AC v4

Classification

Weakness
  • CWE-798 Use of Hard-coded Credentials

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.