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How the CVE Works
CVE-2025-2449 is a directory traversal vulnerability in NI FlexLogger’s `usiReg` component, which improperly validates user-supplied paths in URI files. Attackers can craft malicious files or web pages that, when processed by FlexLogger, allow arbitrary file creation due to insufficient path sanitization. By exploiting this flaw, an attacker can write malicious files to sensitive system directories, leading to remote code execution (RCE) in the context of the current user. The vulnerability requires user interaction, such as opening a malicious file or visiting a compromised webpage. The lack of proper input validation in `usiReg` enables directory traversal sequences (../) to escape intended file paths.
DailyCVE Form
Platform: NI FlexLogger
Version: Affected versions prior to patch
Vulnerability: Directory Traversal → RCE
Severity: Critical
Date: 08/18/2025
Prediction: Patch expected by 10/2025
What Undercode Say
Analytics:
– `usiReg.exe -parse malicious.uri` (debugging)
– `../malicious.dll` (traversal payload)
– `regsvr32 /s evil.dll` (RCE trigger)
How Exploit:
- Craft malicious URI file with traversal sequences.
- Trick user into opening file/visiting malicious site.
- Write payload to startup folder for persistence.
Protection from this CVE:
- Apply vendor patch.
- Disable URI file handling.
- Restrict file execution.
Impact:
- Full system compromise.
- Data exfiltration.
- Lateral movement.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
