CVE-2026-25785: Critical LANSCOPE Endpoint Manager Flaw Enables Unauthenticated Remote Code Execution via Path Traversal

LANSCOPE Endpoint Manager (On-Premises) – Path Traversal Leading to Arbitrary File Tampering and Remote Code Execution

CVE ID: CVE-2026-25785
Affected Product: LANSCOPE Endpoint Manager (On-Premises) – Sub-Manager Server
Affected Versions: 9.4.7.3 and earlier
Fixed Version: 9.4.8.0
CVSS v3.1 Score: 9.8 (Critical)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Impact: Complete compromise of confidentiality, integrity, and availability

This vulnerability exists in the Sub-Manager Server component of LANSCOPE Endpoint Manager (on-premises edition). Improper validation of file path inputs allows an attacker to traverse directories outside the intended application scope. Because file write operations are affected, arbitrary file tampering becomes possible. Under certain conditions, this can result in remote code execution (RCE) on the affected server.

Cloud editions are not impacted.

Technical Description

The issue is caused by insufficient canonicalization and validation of file path parameters supplied to server-side file handling routines. Path traversal sequences such as ../ or encoded equivalents are not properly restricted before filesystem access occurs.

As a result, the application may:

Read arbitrary files outside the intended directory.
Overwrite configuration files.
Create or replace executable or script files.
Drop files into web-accessible directories.
Modify service-related files used by the system.

When write access extends to executable locations or service-dependent files, execution of attacker-controlled code may occur. Because authentication is not required, exploitation can be performed remotely over the network.

Attack Scenario

In a typical exploitation scenario:

The Sub-Manager server is exposed to internal or external network access.
A specially crafted HTTP request containing directory traversal sequences is submitted.
The application processes the manipulated path without proper sanitization.
Arbitrary file write is achieved.
A malicious file (e.g., script, web shell, modified configuration, or service binary) is placed.
The malicious file is executed by the application or operating system.

Once execution is obtained, full system compromise becomes possible under the service account context.

Impact Assessment

If successfully exploited, an attacker may:

Gain remote code execution.
Extract sensitive configuration data.
Deploy web shells.
Establish persistence via scheduled tasks or services.
Move laterally within the network.
Disable security tools.
Exfiltrate endpoint monitoring data.

Because no authentication is required and attack complexity is low, this vulnerability is considered critical.

Proof-of-Concept (Educational)

At the time of this analysis, no officially published public exploit framework has been widely distributed. However, the vulnerability class is well understood and easily reproducible by security researchers.

A conceptual PoC approach (for lab validation only) would involve:

Sending HTTP requests containing encoded traversal payloads.
Attempting to write files outside the application root.
Verifying whether file creation or overwrite occurs.

Common traversal encodings observed in similar cases:

../
..%2F
%2e%2e/
%2e%2e%5c

Indicators of successful exploitation may include:

Unexpected file creation in application directories.
Modified configuration files.
Newly created executable or script files.
Unexpected child processes spawned by the LANSCOPE service.

This information is provided strictly for defensive validation in controlled environments.

Indicators of Compromise (IOCs)

HTTP requests containing traversal sequences targeting Sub-Manager endpoints.
Unexpected file writes in:
- LANSCOPE installation directories
- Web server root
- Temporary directories
Creation of new scheduled tasks.
New Windows services.
Suspicious outbound connections from the Sub-Manager server.
Execution of cmd.exe, powershell.exe, or rundll32.exe by the LANSCOPE service account.

Detection Strategy

Detection should focus on three layers:

Network layer
Web/application logs
Host-level telemetry

Network Detection Rules (Suricata)

alert http any any -> $SUBMANAGER_SERVER any (
    msg:"Possible Path Traversal Attempt - LANSCOPE Sub-Manager";
    http_uri;
    pcre:"/(\.\.\/|\.\.%2[fF]|%2e%2e)/i";
    sid:2578501;
    rev:1;
)

IIS Log Hunting Query (Splunk)

index=web_logs sourcetype="iis"
| search cs_uri_query="*../*" OR cs_uri_query="*%2e%2e*" OR cs_uri_query="*..%2f*"
| stats count by clientip, cs_uri_stem, cs_uri_query, useragent

Microsoft Sentinel (KQL) – Suspicious Web Request

CommonSecurityLog
| where RequestURL contains "../"
   or RequestURL contains "%2e%2e"
   or RequestURL contains "..%2f"
| summarize count() by SourceIP, RequestURL, DeviceVendor

Sysmon Detection – Suspicious File Creation

index=sysmon EventCode=11
| where TargetFilename like "C:\\Program Files\\LANSCOPE\\%"
| stats count by Image, TargetFilename, User

Sysmon Detection – Suspicious Process Spawn

index=sysmon EventCode=1
| where ParentImage like "%LANSCOPE%"
| where Image like "%cmd.exe%" OR Image like "%powershell.exe%" OR Image like "%rundll32.exe%"
| stats count by ParentImage, Image, CommandLine

Persistence Monitoring (Scheduled Tasks)

index=wineventlog EventCode=4698
| stats count by TaskName, SubjectUserName

Recommended Mitigation

Immediate Actions

Upgrade to version 9.4.8.0 immediately.
Restrict Sub-Manager access to trusted IP ranges.
Enable detailed logging for web and system events.
Deploy WAF rules blocking traversal sequences.
Review file integrity for unexpected modifications.

Long-Term Hardening

Ensure least-privilege service accounts.
Deploy application whitelisting.
Monitor critical directories with file integrity monitoring.
Segment management servers from general network access.
Perform regular vulnerability assessments.

Official Patch / Upgrade Link

Upgrade instructions and fixed version details are available directly from the vendor:

Official Advisory and Patch Information:
https://www.motex.co.jp/news/notice/2026/release260225/

Only vendor-provided update packages should be used.

Risk Evaluation Summary

This vulnerability represents a high-confidence remote exploitation risk due to:

No authentication requirement
Low complexity
High impact
File write capability
Potential for full system compromise

Environments where the Sub-Manager is exposed beyond a tightly controlled management network face elevated risk.

Immediate patching and log review are strongly recommended.