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TI-2026-15077 Aliases CVE-2026-18330GHSA-6x43-g54r-9p4x

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

Priority LOW 27CWE-321Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00327 25th percentileScored 2026-11-07
Fix Fixed RE305 v3 (TP-Link Systems Inc.): 1.1.8 Build 20260921 Rel. 42853Archer C7 v5 (TP-Link Systems Inc.): 1.3.1 Build 20260821 Rel. 41256

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TP-LinkRE305 v3before 1.1.8 Build 20260921 Rel. 428531.1.8 Build 20260921 Rel. 42853Patch availableCNA
TP-LinkArcher C7 v5before 1.3.1 Build 20260821 Rel. 412561.3.1 Build 20260821 Rel. 41256Patch availableCNA
  • RE305 v3 VendorTP-Link Affected before 1.1.8 Build 20260921 Rel. 42853 Fixed in 1.1.8 Build 20260921 Rel. 42853 Patch available CNA
  • Archer C7 v5 VendorTP-Link Affected before 1.3.1 Build 20260821 Rel. 41256 Fixed in 1.3.1 Build 20260821 Rel. 41256 Patch available CNA

Remediation

  • Fix · CNA RE305 v3 (TP-Link Systems Inc.) Fixed in 1.1.8 Build 20260921 Rel. 42853
  • Fix · CNA Archer C7 v5 (TP-Link Systems Inc.) Fixed in 1.3.1 Build 20260821 Rel. 41256

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-18330
  2. 2026-10-03 Alias added: GHSA-6x43-g54r-9p4x
  3. 2026-10-27 Title updated · CNA
  4. 2026-10-27 Fix available: TP-Link Systems Inc./Archer C7 [email protected] Build 20260821 Rel. 41256, TP-Link Systems Inc./RE305 [email protected] Build 20260921 Rel. 42853 · CNA
  5. 2026-10-27 5 new references · CNA

References

Patch 4

Advisory 1

  • TI-2023-16571 TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain… KEVCVSS 3.1HIGH 8.8
  • TI-2023-01313 Command injection in TP-Link Archer AX21 KEVCVSS 3.1HIGH 8.8
  • TI-2020-14907 TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on the… KEVCVSS 3.1HIGH 8.8
  • TI-2025-08589 Authenticated RCE via Parental Control command injection KEVCVSS 4.0HIGH 8.6
  • TI-2015-02672 Directory traversal vulnerability in TP-LINK Archer C5 (1.2) with firmware before 150317… KEVCVSS 3.1HIGH 7.5
  • TI-2023-27456 Authentication bypass by spoofing in TP-Link TL-WR841N KEVCVSS 3.1MEDIUM 6.5
See all 636 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences