CVE-2026-18330

Hardcoded Shared RSA-1024 Private Key in Web Login in TP-Link RE305 and Archer C7

MEDIUM
6.1
CVSS Score
Published: September 3, 2026 at 10:24 PM UTC
Updated: October 27, 2026 at 06:17 PM UTC
3 products affected across 2 vendorsArcher C7 v5RE305 v3Archer AX55

Using Archer AX55 v4 by TP-Link Systems Inc.?

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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.

Affected

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

v < 1.2.1 Build 20260527
Affected range stops below 1.2.1 Build 20260527, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.1MEDIUMTPLink
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-321

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