CVE-2026-18330

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.

CVSS 4.0

6.1CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-27)

CWE

CWE-321

Published

2026-09-03

Modified

2026-10-27

Record from

the NVD, synced 2026-10-27

References

• https://www.tp-link.com/en/support/download/archer-c7/v5/#Firmware
• https://www.tp-link.com/en/support/download/re305/v3/#Firmware
• https://www.tp-link.com/us/support/download/archer-c7/v5/#Firmware
• https://www.tp-link.com/us/support/download/re305/v3/#Firmware
• https://www.tp-link.com/us/support/faq/5362/

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