PT-2026-58867 · Tp Link Systems · Kasa Ec70 V4+1

Christopher Childress · Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-9770

NVD

CVSS v4.0

8.6

High

Base vector

AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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

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

Fix

Weakness Enumeration

CWE-321

Related Identifiers

CVE-2026-9770

Affected Products

Kasa Ec70 V4

Kasa Ec71 V4

References · 6

• https://tp-link.com/en/support/download/ec70/v4/#Firmware-Release-Notes · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-9770 · Security Note
• https://tp-link.com/us/support/download/ec70/v4/#Firmware-Release-Notes · Patch
• https://tp-link.com/en/support/download/ec71/v4/#Firmware-Release-Notes · Patch
• https://tp-link.com/us/support/faq/5192 · Vendor Advisory
• https://tp-link.com/us/support/download/ec71/v4/#Firmware-Release-Notes · Patch