Platform
other
Component
mbconnect24
Fixed in
2.19.5
2.19.5
CVE-2026-33616 describes a critical SQL Injection vulnerability discovered in mbCONNECT24, a product used for managing and controlling heating systems. This vulnerability allows an unauthenticated attacker to inject malicious SQL code through the mb24api endpoint, potentially compromising sensitive data. Versions 0.0.0 through 2.19.4 are affected, and a fix is pending release from the vendor.
The SQL Injection vulnerability in mbCONNECT24 poses a significant risk to data confidentiality. An attacker exploiting this flaw can bypass authentication and directly manipulate the database queries. This could lead to unauthorized access to user credentials, system configuration details, and potentially even control over the heating system itself. The impact is amplified by the fact that the vulnerability is unauthenticated, meaning an attacker does not need any valid credentials to exploit it. Successful exploitation could result in a complete breach of data integrity and availability, disrupting heating system operations and exposing sensitive information.
CVE-2026-33616 was publicly disclosed on 2026-04-02. The vulnerability's severity is rated HIGH (CVSS 7.5). Currently, there are no publicly available proof-of-concept exploits, but the unauthenticated nature of the vulnerability and the potential for significant data compromise suggest a medium probability of exploitation. It is not currently listed on the CISA KEV catalog.
Exploit Status
EPSS
0.06% (20% percentile)
CISA SSVC
CVSS Vector
Due to the lack of a readily available patch, immediate mitigation strategies are crucial. Implement strict input validation on the mb24api endpoint to sanitize user-supplied data and prevent SQL injection attempts. Consider deploying a Web Application Firewall (WAF) with rules specifically designed to detect and block SQL injection payloads targeting the endpoint. Monitor access logs for suspicious SQL queries and unusual database activity. While not a complete solution, restricting network access to the mbCONNECT24 server and implementing strong firewall rules can limit the attack surface. Regularly review and update the mbCONNECT24 configuration to minimize potential vulnerabilities. Once a patch is released, prioritize upgrading to the fixed version immediately.
Update mbCONNECT24 to a version later than 2.19.4. This will fix the SQL Injection vulnerability and protect data confidentiality.
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CVE-2026-33616 is a high-severity SQL Injection vulnerability affecting mbCONNECT24 versions 0.0.0 through 2.19.4, allowing unauthenticated attackers to potentially access sensitive data.
If you are using mbCONNECT24 versions 0.0.0 through 2.19.4, you are potentially affected by this vulnerability. Assess your exposure and implement mitigation strategies.
Upgrade to a patched version of mbCONNECT24 as soon as it becomes available. Until then, implement input validation and WAF rules to mitigate the risk.
While no public exploits are currently available, the unauthenticated nature of the vulnerability suggests a potential for exploitation. Monitor your systems closely.
Refer to the mbCONNECT24 vendor's website or security advisory page for the official advisory regarding CVE-2026-33616.
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