VulnerabilityPublished 17 Sep 2026

Smartphone application Tohoku Electric Power "Yorisou e Net" vulnerable to use of hard-coded cryptographic key

Source JVN Japan

Severity

Medium

Rated by Threat Radar

Data as of 17 Sep 2026, 05:07 UTC

What to do

AI-suggested

Users and administrators should monitor for vendor advisories regarding updates or fixes. Until a fix is available, minimizing sensitive operations within the app or limiting its use may reduce risk. Avoid relying on this application for highly sensitive operations if possible.

Description

The smartphone application "Yorisou e Net" by Tohoku Electric Power Company uses a hard-coded cryptographic key. This practice can weaken the security of the application by making the cryptographic key accessible to attackers who analyze the app, potentially compromising data confidentiality or integrity.

Impact

The use of a hard-coded cryptographic key can lead to unauthorized access to encrypted data or allow attackers to bypass security controls relying on the key. However, no known exploits or active attacks have been reported. The impact depends on how the key is used within the application and what data or functions it protects.

Summary

The "Yorisou e Net" smartphone application provided by Tohoku Electric Power Company contains a hard-coded cryptographic key. Hard-coded keys are embedded directly in the application's code, which can be extracted by reverse engineering. This vulnerability may allow attackers to decrypt sensitive data or impersonate legitimate users if the key is used for authentication or encryption purposes. No further technical details or exploitation evidence are provided.

References

jvn.jp/en/jp/JVN93985674/ (opens in a new tab)

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What to do

Description

AI analysisMachine-generated, updated 17 Sep 2026, 05:07 UTC

References

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