---
id: CVE-2026-18330
title: "A hard-coded\ncryptographic key vulnerability exists in the\_web module of TP-Link Archer\nAX55 v4"
summary: "A hard-coded\ncryptographic key vulnerability exists in the\_web module of TP-Link Archer\nAX55 v4. A LAN attacker who captures an HTTP login session may use the known\nshared RSA private key to decrypt the\_administrator\_password; the\nweaken…"
severity: medium
cwe:
  - CWE-321
published: '2026-09-03'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:15:18.627'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18330'
references:
  - url: 'https://www.tp-link.com/us/support/download/archer-ax55/v4/#Firmware'
    label: f23511db-6c3e-4e32-a477-6aa17d310630
  - url: 'https://www.tp-link.com/us/support/faq/5279/'
    label: f23511db-6c3e-4e32-a477-6aa17d310630
  - url: 'https://www.tp-link.com/us/support/download/re305/v3/#Firmware'
  - url: 'https://www.tp-link.com/en/support/download/re305/v3/#Firmware'
  - url: 'https://www.tp-link.com/en/support/download/archer-c7/v5/#Firmware'
  - url: 'https://www.tp-link.com/us/support/download/archer-c7/v5/#Firmware'
  - url: 'https://www.tp-link.com/us/support/faq/5362/'
tags:
  - nvd
  - cve.org
epss: 0.00258
epssPercentile: 0.17427
ingestedAt: '2026-09-08T20:10:03.161Z'
vendor: TP-Link Systems Inc.
product: RE305 v3
affected:
  - re305_v3 < 1.1.8 Build 20260921 Rel. 42853
  - archer_c7_v5 < 1.3.1 Build 20260821 Rel. 41256
cvss: 6.1
cvssVector: 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-04T17:39:51.418332Z'
cvssSource: cna
---

## Overview

A hard-coded
cryptographic key vulnerability exists in the web module of TP-Link Archer
AX55 v4. A LAN attacker who captures an HTTP login session may use the known
shared RSA private key to decrypt the administrator password; the
weakened AES session key further reduces the effort required to
compromise session confidentiality.





Successful
exploitation may disclose the administrator password captured from an HTTP
login session and compromise session confidentiality.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.