CVE-2026-18330

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

Published Sep 3, 2026 CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Description
A hard-coded
cryptographic key vulnerability exists in TP-Link RE305 V3 and Archer C7 V5.
The same RSA-1024 private key is stored within firmware configuration files and
reused across devices. An attacker who obtains the private key and captures an
HTTP Web UI login session may use the key to decrypt the administrator
password. 





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

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
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. A hard-coded cryptographic key vulnerability exists in TP-Link RE305 V3 and Archer C7 V5. The same RSA-1024 private key is stored within firmware configuration files and reused across devices. An attacker who obtains the private key and captures an HTTP Web UI login session may use the key to decrypt the administrator password.  Successful exploitation may disclose the administrator password captured from an HTTP login session and compromise session confidentiality.
Title Hardcoded Shared RSA-1024 Private Key in TP-Link Archer AX55 v4 Hardcoded Shared RSA-1024 Private Key in Web Login in TP-Link RE305 and Archer C7
References
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Tp-link
Tp-link archer Ax55 V4
Vendors & Products Tp-link
Tp-link archer Ax55 V4
Type Values Removed Values Added
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.
Title Hardcoded Shared RSA-1024 Private Key in TP-Link Archer AX55 v4
Weaknesses CWE-321
References
Metrics cvssV4_0

{'score': 6.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
TPLink
Published
Updated
Oct 27, 2026, 5:39 PM
Reserved
Jul 29, 2026, 8:03 PM
Status
Deferred
Published
Sep 3, 2026, 11:17 PM
Modified
Oct 27, 2026, 6:17 PM