CVE-2026-18330 json
Hardcoded Shared RSA-1024 Private Key in Web Login in TP-Link RE305 and Archer C7
published 2026-09-03 2 mo ago modified 2026-10-27 12 d ago also EUVD-2026-70819
- cvss
- 6.1
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- TP-Link Systems Inc. RE305 v3 1.1.8 Build 20260921 Rel. 42853
- TP-Link Systems Inc. Archer C7 v5 1.3.1 Build 20260821 Rel. 41256
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.1 | 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 |
| CNA | 4.0 | 6.1 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- TP-Link Systems Inc. RE305 v3
- TP-Link Systems Inc. Archer C7 v5
Classification
- Weakness
-
- CWE-321 Use of Hard-coded Cryptographic Key
References
Sources
- CVE List CVE-2026-18330
- NVD CVE-2026-18330
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.