CVE-2026-21891 Scanner

ZimaOS is a widely used operating system typically employed in various IT environments by businesses and organizations that require a trustworthy and secure system. Managed by ZimaSpace, this operating system is designed to facilitate seamless integration and interaction among various applications and services. It is favored for its high performance and customizable features, appreciated by IT administrators and developers alike. ZimaOS supports a wide range of system services, catering to both general and specialized computing needs. As technology evolves, newer versions of ZimaOS continue to be developed to meet growing security and functionality demands. It also provides administrative interfaces making it crucial for secure, efficient network and data management.

The Improper Authentication vulnerability affecting ZimaOS version 1.5.0 and below poses severe security risks. It is characterized by inadequate password validation within the login function for system service accounts, allowing attackers to authenticate using any password. Exploiting this vulnerability requires minimal knowledge, as attackers only need to know commonly used usernames. This flawed authentication mechanism results in unauthorized system access, bypassing standard security checks. This serious flaw arises from ZimaOS's failure to enforce stringent password verification policies. Such a lapse affects the integrity and security of systems relying on ZimaOS, necessitating urgent remediation to avert unauthorized exploitation. The vulnerability serves as a reminder of the critical importance of robust authentication processes in modern software solutions.

In technical terms, this vulnerability manifests during the login process via ZimaOS's HTTP POST requests to system endpoints. The deficient authentication handling allows any password to be accepted for known accounts such as "root," granting unwarranted access. This exploit targets '/v1/users/login' endpoint, exploiting the lack of effective password checks. Attackers make crafted requests with any string in the password field alongside common usernames to trigger this vulnerability. The primary vulnerable parameter is the password, where poor validation controls are the weak link. Furthermore, the vulnerability affects systems at the root level, enabling potential widespread unauthorized actions. Developers must address this gap by implementing strict authentication protocols to mitigate these risks.

When exploited by malicious actors, this authentication vulnerability can have dire consequences. Attackers can gain unauthorized access to critical system components, escalated privileges, and breach sensitive data by bypassing standard security measures. This unauthorized access could lead to data theft, system manipulation, or complete operational control by hackers, undermining organizational integrity. Moreover, exploiting such vulnerabilities may enable attackers to introduce malware or other harmful operational disruptions. The impact of this vulnerability is profound, potentially affecting overall business operations, customer trust, and financial stability. Organizations using ZimaOS versions prior to 1.5.0 must act promptly to mitigate these risks and secure affected systems.

REFERENCES

• https://github.com/IceWhaleTech/ZimaOS/security/advisories/GHSA-xj93-qw9p-jxq4
• https://nvd.nist.gov/vuln/detail/CVE-2026-21891