CVE Catalog

CVE-2026-9770

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.36%

29th percentile - higher than 29% of all known CVEs

Summary

The firmware of EC71 v4 and EC70 v4 cash registers 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.

Risk Assessment

The risk is that an unauthenticated attacker on the same network can use this key in the web management service, enabling passive decryption of traffic or active man-in-the-middle (MITM) attacks, compromising the confidentiality of encrypted communications.

Recommendation

Immediately update the cash register firmware to a version that does not contain a static private key, and replace all affected devices with ones having unique keys.

Related vulnerabilities

Original NVD description (English source)

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

Vulnerability data from NVD (NIST) · CISA KEV · EPSS