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TI-2026-79028 Aliases CVE-2026-89052GHSA-9cmp-4hhr-2px3

Hardcoded key in TP-Link Archer C6 exposes stored credentials

Priority LOW 26CWE-321Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.

Summary

TP-Link Archer C6 V2 from 0 before 1.2.1 Build 260902 uses a universal cryptographic key shared across devices (CWE-321). The hardcoded key lets an attacker who obtains an encrypted configuration file or other protected credential data recover plaintext credentials. A network attacker with high privileges can disclose sensitive information, including administrative credentials.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

A hardcoded cryptographic key management vulnerability exists in Archer C6 due to the use of a universal cryptographic key shared across devices. An attacker who obtains an encrypted configuration file or other protected credential data can recover plaintext credentials.  Successful exploitation may allow unauthorized disclosure of sensitive information, including administrative credentials.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00238 14th percentileScored 2026-11-07
Fix Fixed Archer C6 V2 (TP-Link Systems Inc.): 1.2.1 Build 260902

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TP-LinkArcher C6 V2before 1.2.1 Build 2609021.2.1 Build 260902Patch availableCNA
  • Archer C6 V2 VendorTP-Link Affected before 1.2.1 Build 260902 Fixed in 1.2.1 Build 260902 Patch available CNA

Remediation

Upgrade TP-Link Archer C6 V2 to version 1.2.1 Build 260902.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Archer C6 V2 (TP-Link Systems Inc.) Fixed in 1.2.1 Build 260902

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-89052
  2. 2026-10-22 Alias added: GHSA-9cmp-4hhr-2px3
  3. 2026-10-23 Priority changed: MEDIUM → LOW
  4. 2026-10-30 CISA SSVC decision points changed

References

Patch 1

Advisory 1

  • TI-2023-16571 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… KEVCVSS 3.1HIGH 8.8
  • TI-2023-01313 Command injection in TP-Link Archer AX21 KEVCVSS 3.1HIGH 8.8
  • TI-2020-14907 TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on the… KEVCVSS 3.1HIGH 8.8
  • TI-2025-08589 Authenticated RCE via Parental Control command injection KEVCVSS 4.0HIGH 8.6
  • TI-2015-02672 Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317… KEVCVSS 3.1HIGH 7.5
  • TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
See all 636 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences