CVE-2026-18330Hardcoded Shared RSA-1024 Private Key in Web Login in TP-Link RE305 and Archer C7
- 6.1MediumCVSS base score
- 0.33%Exploitation in 30 daysEPSS · top 74% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By TPLink
- 36 days later
· 36 days later
Published
- 54 days later
· 54 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| TPLinkCNA (assigner) | 4.0 | Medium6.1 | 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 |
| NVDNVD · Deferred | 4.0 | Medium6.1 | 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 |
- EPSS (exploitation in 30 days)
- 0.33% · top 74% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
TP-Link Systems Inc. · RE305 v3
- affected < 1.1.8 Build 20260921 Rel. 42853
TP-Link Systems Inc. · Archer C7 v5
- affected < 1.3.1 Build 20260821 Rel. 41256
References
References5
- https://www.tp-link.com/us/support/download/re305/v3/#Firmware (opens in a new tab)patch
- https://www.tp-link.com/en/support/download/re305/v3/#Firmware (opens in a new tab)patch
- https://www.tp-link.com/en/support/download/archer-c7/v5/#Firmware (opens in a new tab)patch
- https://www.tp-link.com/us/support/download/archer-c7/v5/#Firmware (opens in a new tab)patch
- https://www.tp-link.com/us/support/faq/5362/ (opens in a new tab)vendor-advisory
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-70819 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-18330)Record last updated .