CVE-2026-22906
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AES-ECB Key Exposure in Credential Storage Enables Remote Decryption

Publication date: 2026-02-09

Last updated on: 2026-02-09

Assigner: CERT VDE

Description
User credentials are stored using AES‑ECB encryption with a hardcoded key. An unauthenticated remote attacker obtaining the configuration file can decrypt and recover plaintext usernames and passwords, especially when combined with the authentication bypass.

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Meta Information

Published
2026-02-09
Last Modified
2026-02-09
Generated
2026-07-06
AI Q&A
2026-02-09
EPSS Evaluated
2026-07-05
NVD
CVE-2026-22906
EUVD
EUVD-2026-6926

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wago 852-1328 to 2.65 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-321 The product uses a hard-coded, unchangeable cryptographic key.

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Executive Summary

This vulnerability involves user credentials being stored using AES-ECB encryption with a hardcoded key. Because the key is hardcoded and the encryption mode (ECB) is insecure, an unauthenticated remote attacker who obtains the configuration file can decrypt and recover plaintext usernames and passwords.

The risk is increased when this vulnerability is combined with an authentication bypass, allowing attackers easier access to the configuration file.

Impact Analysis

This vulnerability can have severe impacts including unauthorized access to sensitive user credentials. An attacker can decrypt usernames and passwords, potentially gaining full control over the affected system.

The CVSS score of 9.8 indicates a critical severity, meaning the vulnerability can lead to complete confidentiality, integrity, and availability compromise without requiring any privileges or user interaction.

Compliance Impact

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Detection Guidance

I don't know

Mitigation Strategies

The vendor recommends updating to firmware version 02.65 to remediate the vulnerabilities including insecure credential storage and authentication bypass issues.

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