CVE-2026-18330: Hard-coded Cryptographic Key Vulnerability Exists
Source GCVE Database
Not known to be exploited · CVSS 6.1 Medium : upgrade to 1.1.8 Build 20260921 Rel. 42853 when convenient.
Data as of 27 Oct 2026, 20:27 UTC
- Patch
- Available – fixed in 1.1.8 Build 20260921 Rel. 42853, 1.3.1 Build 20260821 Rel. 41256
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 3 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade RE305 v3 to 1.1.8 Build 20260921 Rel. 42853; Archer C7 v5 to 1.3.1 Build 20260821 Rel. 41256.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| TP-Link Systems Inc.RE305 v3 | Affected
| Fixed in
|
| TP-Link Systems Inc.Archer C7 v5 | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, avoid using HTTP for login sessions on the affected device and restrict LAN access to trusted users only.
Description
A hard-coded cryptographic key vulnerability in the web module of TP-Link Archer AX55 v4 allows a LAN attacker who captures an HTTP login session to decrypt the administrator password. The vulnerability involves a known shared RSA private key and a weakened AES session key, which together reduce the effort required to compromise session confidentiality.
References
- nvd.nist.gov/vuln/detail/CVE-2026-18330 (opens in a new tab)
- tp-link.com/en/support/download/archer-c7/v5/ (opens in a new tab)
- tp-link.com/en/support/download/re305/v3/ (opens in a new tab)
- tp-link.com/us/support/download/archer-ax55/v4/ (opens in a new tab)
- tp-link.com/us/support/download/archer-c7/v5/ (opens in a new tab)
- tp-link.com/us/support/download/re305/v3/ (opens in a new tab)
- tp-link.com/us/support/faq/5279 (opens in a new tab)
- tp-link.com/us/support/faq/5362 (opens in a new tab)