Weak Encryption Flaw in User Credentials Affects Popular Software by Vendor

CVE-2026-22906

What is CVE-2026-22906?

CVE-2026-22906 is a vulnerability affecting software developed by Wago, which is widely used in industrial automation and building management systems. This flaw is characterized by a weakness in the encryption approach utilized for storing user credentials. Specifically, the vulnerability arises from the use of AES-EBC encryption with a hardcoded key, making the stored usernames and passwords susceptible to unauthorized access. An unauthenticated remote attacker who gains access to the configuration file can decrypt these credentials, effectively compromising user accounts. The ability to bypass authentication further exacerbates the situation, as it allows attackers to exploit this weakness without needing valid credentials, posing a significant risk to the integrity and confidentiality of the organization's data.

Potential impact of CVE-2026-22906

1. Unauthorized Access to Sensitive Systems: The vulnerability facilitates unauthorized access to systems where user credentials can be decrypted. This access could lead to the manipulation of sensitive operational processes or data, resulting in operational disruptions.

2. Data Breach Risk: With plaintext usernames and passwords exposed, organizations face a heightened risk of data breaches. Attackers can exploit stolen credentials to gain entry to systems, potentially compromising sensitive information which may include confidential business data, customer's personal information, or critical operational knowledge.

3. Increased Attack Surface for Cyber Threats: The presence of this vulnerability creates an avenue for additional attacks, including lateral movement within networks. Once attackers gain access using compromised credentials, they can deploy further exploitation tools or ransomware, increasing the chance of extensive damage to the organization’s infrastructure.

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