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CVE-2026-4773: Authentication Bypass Vulnerability in Magarsus Consulting IDM-MFA

CVE-2026-4773 is an improper input validation vulnerability in Magarsus Consulting Ltd. Co. IDM-MFA, allowing authentication bypass in versions from 2025.11.27 before 2026.03.10.

A critical vulnerability, tracked as CVE-2026-4773, has been identified in the Magarsus Consulting Ltd. Co. IDM-MFA product. This flaw, categorized as an improper validation of specified type of input (CWE-1287), enables an unauthenticated attacker to bypass the authentication mechanism. The vulnerability impacts IDM-MFA versions ranging from 2025.11.27 up to, but not including, 2026.03.10. Exploitation of this vulnerability could lead to unauthorized access to the IDM-MFA system, potentially allowing attackers to view sensitive information, modify system configurations, or perform actions reserved for legitimate users. Defenders should prioritize patching affected systems to mitigate this severe risk.

Attack Chain

  1. An unauthenticated attacker identifies an internet-exposed instance of Magarsus Consulting Ltd. Co. IDM-MFA.
  2. The attacker crafts a specially malformed input, targeting a specific parameter or field within the IDM-MFA system known to be susceptible to improper validation.
  3. The crafted input is submitted to the vulnerable IDM-MFA application, initiating the exploitation of the improper validation vulnerability (CVE-2026-4773).
  4. Due to the successful exploitation, the IDM-MFA system's authentication process is bypassed.
  5. The attacker gains unauthorized access to the IDM-MFA application without providing valid credentials.
  6. With unauthorized access, the attacker can potentially enumerate authenticated users, view sensitive system data, or perform administrative functions.

Impact

The successful exploitation of CVE-2026-4773 results in an authentication bypass, granting unauthenticated attackers unauthorized access to the Magarsus Consulting IDM-MFA system. This can lead to a compromise of the system's integrity and confidentiality, as attackers can potentially gain full control over the application. Depending on the information managed by the IDM-MFA solution, this could expose sensitive user data, authentication credentials, or allow for manipulation of critical access control policies. While specific victim counts or sectors are not disclosed, any organization utilizing vulnerable versions of Magarsus Consulting IDM-MFA is at risk of severe data breaches and system compromise.

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