Vulnerability in TP-Link Kasa Ec70
CVE-2026-9770
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
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.003 · change: -0.001
Affected products
- TP-Link Kasa Ec70 — versions 4.0
- TP-Link Kasa Ec70 Firmware
- TP-Link Kasa Ec71 — versions 4.0
- TP-Link Kasa Ec71 Firmware
- TP-Link Systems Inc. Kasa Ec70 V4 — versions 0
- TP-Link Systems Inc. Kasa Ec71 V4 — versions 0
Weakness classification (CWE)
References
- f23511db-6c3e-4e32-a477-6aa17d310630 (Release Notes, patch)
- f23511db-6c3e-4e32-a477-6aa17d310630 (Release Notes, patch)
- f23511db-6c3e-4e32-a477-6aa17d310630 (Release Notes, patch)
- f23511db-6c3e-4e32-a477-6aa17d310630 (Release Notes, patch)
- f23511db-6c3e-4e32-a477-6aa17d310630 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-9770?
- CVE-2026-9770 is a medium-severity vulnerability in TP-Link Kasa Ec70, classified under Use of Hard-coded Cryptographic Key. CVSS score: 5.3/10. Published 2026-07-15.
- How severe is CVE-2026-9770?
- Medium severity. CVSS v3 base score is 5.3 out of 10.