Vulnerability · Published Sep 3, 2026 · Assigned by TPLink

CVE-2026-18330Hardcoded Shared RSA-1024 Private Key in Web Login in TP-Link RE305 and Archer C7

Medium 6.1

In plain English

A medium-severity security flaw in Archer C7 v5 from TP-Link Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 4.0)6.1Medium

Exploit odds (30 days)0.3%top 74.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
TP-Link Systems Inc.	RE305 v3	0 – before 1.1.8 Build 20260921 Rel. 42853
TP-Link Systems Inc.	Archer C7 v5	0 – before 1.3.1 Build 20260821 Rel. 41256

Weakness: CWE-321 · 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

In plain English

Official description

Affected products (as reported)

References