CVE-2026-9770

Enriched by CISA
 

Kasa EC71 v4 and EC70 v4 firmware contains a static cryptographic private key stored in a read-only filesystem that is shared across devices.  An attacker with access to the firmware image can extract the embedded key.  Successful exploitation may allow an unauthenticated attacker on the same network to use this key in the web management service, compromising the confidentiality of encrypted communications. This may enable passive decryption of traffic or active man-in-the-middle (MITM) attacks
https://nvd.nist.gov/vuln/detail/CVE-2026-9770

Categories

CWE-321 : Use of Hard-coded Cryptographic Key
The product uses a hard-coded, unchangeable cryptographic key. Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.) Prevention schemes mirror that of hard-coded password storage. Engineering Workstation uses hard-coded cryptographic keys that could allow for unathorized filesystem access and privilege escalation Remote Terminal Unit (RTU) uses a hard-coded SSH private key that is likely to be used by default. WiFi router service has a hard-coded encryption key, allowing root access Communications / collaboration product has a hardcoded SSH private key, allowing access to root account

References


 

AFFECTED (from MITRE)

Vendor Product Versions
TP-Link Systems Inc. Kasa EC71 v4
  • < 2.4.0 Build 20260520 rel.4191 [affected]
TP-Link Systems Inc. Kasa EC70 v4
  • < 2.4.0 Build 20260520 rel.4191 [affected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe start end

REMEDIATION


EXPLOITS

Exploit-db.com

id description date
No known exploits

POC Github

Url
No known exploits

Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id description severity
No entry