CVE-2026-9770
An attacker with access to the firmware image can extract the embedded key.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- CVSS 4.0
- 8.6 HIGHCVSS: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/M
- EPSS
- 0.36% probability · 30th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-321
- Affected
- tp-link/kasa ec71 firmware · tp-link/kasa ec70 firmware
- Source
- f23511db-6c3e-4e32-a477-6aa17d310630
References
- https://www.tp-link.com/en/support/download/ec70/v4/#Firmware-Release-NotesRelease Notes
- https://www.tp-link.com/en/support/download/ec71/v4/#Firmware-Release-NotesRelease Notes
- https://www.tp-link.com/us/support/download/ec70/v4/#Firmware-Release-NotesRelease Notes
- https://www.tp-link.com/us/support/download/ec71/v4/#Firmware-Release-NotesRelease Notes
- https://www.tp-link.com/us/support/faq/5192/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.