CVE-2026-9770
TP-Link · published 2026-07-15
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by TPLink via the CVE Program.
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
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| TP-Link Systems Inc. | Kasa EC71 v4 | 0 – before 2.4.0 Build 20260520 rel.4191: affected |
| TP-Link Systems Inc. | Kasa EC70 v4 | 0 – before 2.4.0 Build 20260520 rel.4191: affected |
Products named in NVD's CPE match criteria (2)
cpe:2.3:o:tp-link:kasa_ec71_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:tp-link:kasa_ec70_firmware:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 8.6 HIGH — as published by TPLink (Secondary)
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 - CVSS 3.1: 5.3 MEDIUM — as published by NIST (Primary)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://www.tp-link.com/en/support/download/ec70/v4/#Firmware-Release-Notes
- https://www.tp-link.com/en/support/download/ec71/v4/#Firmware-Release-Notes
- https://www.tp-link.com/us/support/download/ec70/v4/#Firmware-Release-Notes
- https://www.tp-link.com/us/support/download/ec71/v4/#Firmware-Release-Notes
- https://www.tp-link.com/us/support/faq/5192/
Source dates: published 2026-07-15, last changed 2026-08-06. DeSpy's copy of this version is dated 2026-09-28.
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