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CVE Vulnerability Database
Vulnerability Database/CVE-2025-7024

CVE-2025-7024: AIRBUS TETRA Server Privilege Escalation

CVE-2025-7024 is a privilege escalation vulnerability in AIRBUS PSS TETRA Connectivity Server that allows attackers to execute code with SYSTEM privileges. This article covers technical details, affected versions, and mitigations.

Published: April 10, 2026

CVE-2025-7024 Overview

CVE-2025-7024 is an Incorrect Default Permissions vulnerability affecting the AIRBUS PSS TETRA Connectivity Server running on Windows Server OS. This vulnerability enables privilege abuse through insecure file system permissions, allowing attackers to potentially execute arbitrary code with SYSTEM privileges when a user is tricked or directed to place a crafted file into the vulnerable directory.

Critical Impact

An attacker may execute arbitrary code with SYSTEM privileges if a user is tricked or directed to place a crafted file into the vulnerable directory, potentially leading to complete system compromise.

Affected Products

  • AIRBUS PSS TETRA Connectivity Server version 7.0
  • Windows Server OS environments running TETRA Connectivity Server

Discovery Timeline

  • 2026-04-03 - CVE-2025-7024 published to NVD
  • 2026-04-03 - Last updated in NVD database

Technical Details for CVE-2025-7024

Vulnerability Analysis

This vulnerability falls under CWE-276: Incorrect Default Permissions. The TETRA Connectivity Server installs or creates directories with overly permissive access controls, allowing low-privileged users to write files to sensitive locations. When the TETRA service processes files from these directories with elevated SYSTEM privileges, malicious payloads can be executed in this privileged context.

The attack requires local access and user interaction—specifically, a user must be convinced to place a specially crafted file into the vulnerable directory. Once the malicious file is in place, the service's elevated execution context allows for complete system compromise.

Root Cause

The root cause is insecure default permissions (CWE-276) on directories used by the TETRA Connectivity Server service. During installation or runtime, directories are created without properly restrictive access control lists (ACLs), enabling unprivileged users to write files that will later be processed by the SYSTEM-level service. This permission misconfiguration creates a local privilege escalation vector.

Attack Vector

The attack vector is local, requiring an attacker to have some level of access to the target system. The exploitation chain involves:

  1. Identifying the vulnerable directory with overly permissive write access
  2. Crafting a malicious payload (such as a DLL, executable, or configuration file)
  3. Social engineering or tricking a user into placing the malicious file into the vulnerable directory
  4. Waiting for the TETRA Connectivity Server service to process the file with SYSTEM privileges
  5. Achieving arbitrary code execution in the SYSTEM security context

The vulnerability mechanism involves the TETRA Connectivity Server service loading or executing files from directories where low-privileged users have write access. An attacker can place a malicious file (such as a crafted DLL for DLL hijacking or an executable for service manipulation) into these directories. When the service processes these files, the malicious code executes with SYSTEM privileges. For detailed technical information about this weakness class, see the CWE-276 definition.

Detection Methods for CVE-2025-7024

Indicators of Compromise

  • Unexpected files appearing in TETRA Connectivity Server installation directories
  • Unauthorized DLL or executable files in service-related paths
  • Unusual process execution chains originating from the TETRA service
  • Modifications to file system ACLs on TETRA-related directories

Detection Strategies

  • Monitor for file creation events in TETRA Connectivity Server directories using Windows Security Event logs (Event ID 4663)
  • Implement file integrity monitoring (FIM) on critical TETRA service directories
  • Configure endpoint detection rules to alert on unusual child processes spawned by the TETRA service
  • Audit directory permissions regularly to identify overly permissive ACLs

Monitoring Recommendations

  • Enable Windows Advanced Audit Policy for Object Access (File System) on TETRA installation directories
  • Deploy SentinelOne's behavioral AI to detect anomalous code execution patterns from service contexts
  • Monitor for privilege escalation attempts using SYSTEM account from non-standard processes
  • Implement real-time alerting for any file modifications in TETRA service paths

How to Mitigate CVE-2025-7024

Immediate Actions Required

  • Apply the vendor-provided security patch immediately to all affected TETRA Connectivity Server 7.0 installations
  • Audit and restrict directory permissions on TETRA installation and working directories
  • Remove write access for non-administrative users from service-related directories
  • Monitor systems for signs of exploitation until patches are fully deployed

Patch Information

AIRBUS has confirmed that a vulnerability fix is available and has been delivered to impacted customers. Organizations running TETRA Connectivity Server 7.0 should contact AIRBUS PSS support to obtain and apply the security patch. The fix addresses the incorrect default permissions by implementing proper restrictive ACLs on vulnerable directories.

Workarounds

  • Manually restrict directory permissions using Windows icacls or Security tab in directory properties
  • Remove write permissions for standard users and groups from TETRA service directories
  • Implement application whitelisting to prevent unauthorized executables from running in service contexts
  • Use SentinelOne's application control features to block unauthorized file execution in protected directories
bash
# Configuration example
# Restrict permissions on TETRA installation directory (adjust path as needed)
icacls "C:\Program Files\AIRBUS\TETRA Connectivity Server" /inheritance:r
icacls "C:\Program Files\AIRBUS\TETRA Connectivity Server" /grant:r Administrators:(OI)(CI)F
icacls "C:\Program Files\AIRBUS\TETRA Connectivity Server" /grant:r SYSTEM:(OI)(CI)F
icacls "C:\Program Files\AIRBUS\TETRA Connectivity Server" /grant:r "Authenticated Users":(OI)(CI)RX

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

  • Vulnerability Details
  • TypePrivilege Escalation

  • Vendor/TechAirbus Tetra Connectivity Server

  • SeverityMEDIUM

  • CVSS Score5.6

  • EPSS Probability0.01%

  • Known ExploitedNo
  • CVSS Vector
  • CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • Impact Assessment
  • ConfidentialityLow
  • IntegrityHigh
  • AvailabilityHigh
  • CWE References
  • CWE-276
  • Technical References
  • CWE Definition #276
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