CVE-2025-66526 identifies a Missing Authorization vulnerability in Essekia's Tablesome software, versions up to and including 1.1.34. The vulnerability stems from incorrectly configured access control security levels, which means that the software does not properly enforce authorization checks on certain operations or data access. This misconfiguration can allow attackers to bypass intended access restrictions, potentially accessing or modifying data or functions without proper permissions. The vulnerability does not require known exploits in the wild yet, and no CVSS score has been assigned, indicating it is newly disclosed. The lack of authorization checks can lead to unauthorized data exposure, data manipulation, or unauthorized actions within the affected system. Since Tablesome is a data management or table-related software product, the impact could affect data confidentiality and integrity significantly. The vulnerability affects all versions up to 1.1.34, with no specific versions excluded. The issue was reserved and published in early December 2025, with Patchstack as the assigner. No patches or mitigations have been officially released at the time of this report, increasing the urgency for organizations to implement compensating controls. The vulnerability's exploitation does not require user interaction or authentication, increasing its risk profile. Organizations relying on Tablesome should audit their access control configurations and prepare for imminent patch deployment.

For European organizations, this vulnerability poses a high risk to data confidentiality and integrity, especially in sectors where Tablesome is used to manage sensitive or critical data sets. Unauthorized access could lead to data breaches, unauthorized data modification, or disruption of business processes relying on accurate data. The absence of proper authorization checks means that attackers could exploit this vulnerability remotely or locally without needing valid credentials, increasing the attack surface. This could affect industries such as finance, healthcare, government, and manufacturing, where data integrity and confidentiality are paramount. Additionally, regulatory compliance frameworks like GDPR impose strict requirements on data protection; exploitation of this vulnerability could lead to non-compliance and significant fines. The lack of known exploits currently provides a window for proactive mitigation, but the risk of future exploitation remains high. Organizations with interconnected systems or those integrating Tablesome into larger platforms may face cascading impacts if unauthorized access propagates through their infrastructure.

1. Immediately review and audit all access control configurations within Tablesome to identify and correct any misconfigurations or overly permissive settings. 2. Implement strict role-based access controls (RBAC) and least privilege principles to limit user permissions to only what is necessary. 3. Monitor logs and access patterns for unusual or unauthorized access attempts to detect potential exploitation early. 4. Isolate Tablesome instances in network segments with restricted access to reduce exposure. 5. Engage with Essekia for updates or patches addressing this vulnerability and plan rapid deployment once available. 6. Consider temporary compensating controls such as multi-factor authentication (MFA) on systems accessing Tablesome to add an additional security layer. 7. Educate system administrators and security teams about the vulnerability and the importance of access control hygiene. 8. If possible, conduct penetration testing focused on authorization bypass scenarios to validate the effectiveness of implemented controls. 9. Maintain an incident response plan ready to address potential exploitation events related to this vulnerability.