CVE-2026-33615

Critical

Published: 02 April 2026

Published

02 April 2026

Modified

16 April 2026

KEV Added

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Patch

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CVSS Score 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS Score 0.0011 28.6th percentile

Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-33615 is a critical-severity SQL Injection (CWE-89) vulnerability in Mbconnectline Mbconnect24. Its CVSS base score is 9.1 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly requires validation mechanisms at input points like the setinfo endpoint to neutralize special elements in SQL UPDATE commands, preventing SQL injection exploitation.

SI-2 Flaw Remediation good match

prevent

Mandates identification, reporting, and correction of the specific SQL injection flaw, remediating the vulnerability to restore integrity and availability.

SI-9 Information Input Restrictions partial match

prevent

Enforces input restrictions such as allowed characters and maximum lengths at the setinfo endpoint, blocking malformed inputs used in SQL injection attacks.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Unauthenticated SQL injection in a public-facing web endpoint (setinfo) directly enables exploitation of a public-facing application for data integrity/availability impact via arbitrary SQL commands.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

An unauthenticated remote attacker can exploit an unauthenticated SQL Injection vulnerability in the setinfo endpoint due to improper neutralization of special elements in a SQL UPDATE command. This can result in a total loss of integrity and availability.

Deeper analysisAI

CVE-2026-33615 is an unauthenticated SQL injection vulnerability (CWE-89) in the setinfo endpoint, stemming from improper neutralization of special elements used in a SQL UPDATE command. It carries a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H), indicating critical severity with high impact on integrity and availability but no confidentiality impact. The vulnerability was published on 2026-04-02.

An unauthenticated remote attacker can exploit this vulnerability over the network with low complexity and no user interaction required. Successful exploitation allows the attacker to compromise data integrity and system availability entirely, potentially enabling arbitrary SQL commands that alter or delete database contents.

Mitigation guidance is detailed in advisories including VDE-2026-030 from CERT VDE (https://certvde.com/de/advisories/VDE-2026-030) and the associated CSAF document (https://mbconnectline.csaf-tp.certvde.com/.well-known/csaf/white/2026/vde-2026-030.json).