Description
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
Affected products
tp-link: kasa ec71 firmware; tp-link: kasa ec71; tp-link: kasa ec70 firmware; tp-link: kasa ec70
References5
- www.tp-link.com/us/support/faq/5192/ Vendor Advisory
- www.tp-link.com/en/support/download/ec70/v4/#Firmware-Release-N… Release Notes
- www.tp-link.com/en/support/download/ec71/v4/#Firmware-Release-N… Release Notes
- www.tp-link.com/us/support/download/ec70/v4/#Firmware-Release-N… Release Notes
- www.tp-link.com/us/support/download/ec71/v4/#Firmware-Release-N… Release Notes
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: NVD
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 4.0
-
8.6
HIGH
Score source: CNA
CVSS:4.0/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 - EPSS — exploit probability
- 0% percentile: 24 · as of 15 November 2026
- CWE
- CWE-321
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.