CVE-2026-89052
MEDIUM 5.9A hardcoded cryptographic key management vulnerability exists in Archer C6 due to the use of a universal cryptographic key shared across devices. An attacker who obtains an encrypted configuration file or other protected credential data can recover plaintext credentials. Successful exploitation may allow unauthorized disclosure of sensitive information, including administrative credentials.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 15th percentile
Impact if exploited
5.9CVSS 4.0 · MEDIUM
- ConfidentialityHigh
- IntegrityLow
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires an admin / high-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ⚠Requirements: Specific conditions must be present
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-321: Use of hard-coded cryptographic key
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
References and research data (JSON)
All CVSS metrics
- MEDIUM 5.9 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N - MEDIUM 5.9 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/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
References
Patches & mitigations
- https://www.tp-link.com/us/support/download/archer-c6/v2/#Firmware CVE record · TPLink · Updated 2026-10-21T22:40:16.165Z
NVD · CVE-2026-89052 · Updated 2026-10-22T15:31:24.813
Advisories
- https://www.tp-link.com/us/support/faq/5356/ CVE record · TPLink · Updated 2026-10-21T22:40:16.165Z
NVD · CVE-2026-89052 · Updated 2026-10-22T15:31:24.813 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-107666 EUVD · EUVD-2026-107666