CVE-2025-10855: Teknoera Auth Bypass Vulnerability

CVE-2025-10855 Overview

CVE-2025-10855 is an Authorization Bypass Through User-Controlled Key vulnerability (CWE-639) affecting Teknoera software developed by Solvera Software Services Trade Inc. This vulnerability allows attackers to exploit trusted identifiers, enabling unauthorized access to resources or data that should be protected by access controls. The flaw occurs when an application uses user-controlled input to directly access objects or resources without proper authorization validation.

Critical Impact

Attackers can bypass authorization controls by manipulating user-controlled keys, potentially gaining unauthorized access to sensitive data belonging to other users or elevated system resources.

Affected Products

• Teknoera (versions through 01102025)

Discovery Timeline

• 2026-01-22 - CVE CVE-2025-10855 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-10855

Vulnerability Analysis

This vulnerability falls under CWE-639: Authorization Bypass Through User-Controlled Key, commonly known as Insecure Direct Object Reference (IDOR). The application fails to properly verify that the user requesting a resource is authorized to access that specific resource. Instead, it relies on user-supplied identifiers (such as database keys, file names, or object references) without performing adequate authorization checks.

The network-based attack vector allows remote exploitation without requiring authentication or user interaction. An attacker can manipulate identifiers in API requests, URL parameters, or form fields to access data belonging to other users or resources they should not have permission to view.

Root Cause

The root cause is improper authorization validation in the Teknoera application. When processing requests that include user-controlled identifiers (such as record IDs, account numbers, or resource references), the application fails to verify that the authenticated user has permission to access the specified resource. This allows attackers to enumerate or guess valid identifiers and access unauthorized data by simply modifying the key values in their requests.

Attack Vector

The vulnerability is exploitable over the network without requiring authentication or user interaction. An attacker can exploit this flaw by:

1. Intercepting legitimate requests containing resource identifiers
2. Modifying the identifier values to reference resources belonging to other users
3. Submitting the modified requests to access unauthorized data

The attack typically involves sequential enumeration or predictable identifier patterns, allowing attackers to systematically access data across multiple user accounts or resources.

Detection Methods for CVE-2025-10855

Indicators of Compromise

• Unusual patterns of sequential or enumerated resource ID access from a single source
• High volume of requests with varying identifier parameters targeting the same endpoint
• Access log entries showing successful retrieval of resources the user should not have permission to view
• Error responses indicating failed authorization attempts followed by successful unauthorized access

Detection Strategies

• Implement web application firewall (WAF) rules to detect parameter tampering and identifier enumeration attempts
• Monitor application logs for anomalous access patterns, particularly sequential ID access
• Deploy API security monitoring to identify unauthorized resource access attempts
• Enable SentinelOne Singularity XDR to correlate suspicious network activity with endpoint behavior

Monitoring Recommendations

• Review access logs for patterns indicating horizontal privilege escalation attempts
• Set up alerts for high-frequency requests modifying resource identifiers
• Monitor for bulk data access that deviates from normal user behavior profiles

How to Mitigate CVE-2025-10855

Immediate Actions Required

• Review and update authorization controls to validate user permissions for each requested resource
• Implement indirect object references using session-specific or user-specific mappings
• Deploy additional access logging to detect exploitation attempts
• Consider restricting access to affected endpoints until patches are applied

Patch Information

Organizations should consult the USOM Security Notification TR-26-0003 for official remediation guidance from the Turkish National Cyber Incident Response Center. Contact Solvera Software Services Trade Inc. for specific patch information and updated versions of Teknoera.

Workarounds

• Implement server-side authorization checks that validate user permissions before returning requested resources
• Replace direct object references with indirect references that map to user-specific session data
• Add rate limiting to prevent enumeration attacks against resource identifiers
• Deploy additional authentication requirements for sensitive data access operations