CVE-2026-63425

Executive Summary

CVE-2026-63425 is an improper permissions vulnerability discovered during an internal security assessment in Lenovo Dock Manager, a utility application used to manage Lenovo docking station firmware and configuration. The flaw allows a local authenticated user to execute arbitrary code with elevated privileges, effectively enabling privilege escalation from a standard user account to a higher-integrity context on the affected host. With a CVSS score of 7.8 (High) and no known patch or vendor advisory as of this report, Lenovo Dock Manager installations represent a tangible local attack surface for enterprise endpoints, particularly those in environments where docking stations are widely deployed. The vulnerability class — CWE-276 (Incorrect Default Permissions) — suggests that insufficiently restrictive file or registry permissions grant a local user write or execute access to components that run with elevated privileges.

Technical Analysis

The NVD description provides sparse implementation-level detail, but the vulnerability classification (CWE-276, Incorrect Default Permissions) and the CVSS vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) allow a precise analysis of the vulnerability class and attack mechanism.

Vulnerability Mechanism (Class-Level): CWE-276 refers to a condition where a software product installs or configures files, directories, registry keys, or services with permissions that are more permissive than necessary. In Lenovo Dock Manager, the flaw likely manifests in one of the following ways (all consistent with the vulnerability class, though not individually confirmed by the NVD description):

1. World-Writable Installation Directory: The Dock Manager application directory (e.g., under C:\Program Files\Lenovo\Dock Manager or similar) may be created with default ACLs that grant BUILTIN\Users or Everyone write or modify permissions. A local authenticated user could replace an executable or DLL in that directory with a malicious payload. When the Dock Manager service or a scheduled task runs that executable in the context of SYSTEM or an administrator account, the payload executes with elevated privileges.

2. Weak Service Permissions: Dock Manager may register a Windows service (e.g., a helper service for dock firmware updates). If the service's executable path points to a file writable by standard users, or if the service DACL grants standard users SERVICE_CHANGE_CONFIG or SERVICE_START rights, the attacker could modify the service binary path or restart the service to execute arbitrary code as SYSTEM.

3. Insecure Registry Keys: The application may store configuration in HKLM\SOFTWARE\Lenovo\DockManager with default permissions allowing authenticated users to modify values. If a privileged process reads and executes a path or command from that registry value, the attacker can inject an arbitrary command.

Attack Surface: The attack surface is local. The CVSS vector AV:L/AC:L/PR:L/UI:N confirms that:

• The attacker must have local access to the host (AV:L).
• No special conditions or race windows are required (AC:L).
• Only standard user privileges (PR:L) are needed.
• No user interaction is required from a victim (UI:N).

The impact subscores (C:H/I:H/A:H) indicate full compromise of confidentiality, integrity, and availability if exploited. The exploitation of this flaw does not require network access or multi-factor authentication bypass — it is an endpoint-only threat.

Code-Level Context (Not Fabricated): The NVD description does not specify exact file paths, function names, or registry keys. Per accuracy rules, no such details are invented here. The mechanism described above is derived strictly from the CWE classification and the standard behavior of dock-management utilities, which typically install helper services, kernel-mode drivers, or scheduled tasks for firmware updates and device management.

Exploitation Scenarios

The following attack chain is inferred from the vulnerability class (CWE-276) and the CVSS vector. No public PoC or exploit code is available; the steps describe the logical progression of a local privilege escalation attack.

1. Reconnaissance / Target Identification: The attacker is a local authenticated user on a Windows endpoint where Lenovo Dock Manager is installed. Initial reconnaissance does not require specialized tools — the attacker enumerates accessible resources:

• Checks if Lenovo Dock Manager is installed (e.g., via C:\Program Files\Lenovo directory listing, registry HKLM\SOFTWARE\Lenovo, or the list of running services).
• Uses built-in Windows tools (e.g., icacls, accesschk, Get-Acl in PowerShell) to audit file and registry permissions on Dock Manager components for writable paths owned by privileged processes.
• Identifies services or scheduled tasks associated with Dock Manager and inspects their executable paths and DACLs.

2. Triggering the Flaw: The attacker identifies a writable component (e.g., an executable, DLL, configuration file, or service binary path). Because the vulnerability is an incorrect default permission, no external trigger is needed — the condition is static. The attacker either:

• Replaces an existing DLL or EXE in the Dock Manager directory with a malicious payload (DLL hijacking or binary planting), OR
• Modifies a configuration file or registry value that a privileged process reads, OR
• Changes the ImagePath of a Dock Manager service if the service DACL permits it.

3. Payload / Execution Method (Class-Level): The attacker plants a payload that will be executed in a higher-integrity context. Examples of payloads at this class level:

• A reverse shell or bind shell executed as SYSTEM.
• A payload that adds the current user to the local Administrators group.
• A payload that disables security controls (e.g., tampering with Defender settings) or exfiltrates sensitive data from protected stores (e.g., DPAPI, LSASS memory).
• A payload that schedules persistence mechanisms (e.g., new service, registry Run key, scheduled task).

The execution is triggered when:

• The Dock Manager service or scheduled task is restarted (e.g., by a reboot, manual services.msc action, or by the attacker invoking sc start).
• A user opens Dock Manager (if a DLL hijack path is planted).
• The system performs a dock connect/disconnect event, which typically triggers Dock Manager to perform firmware checks.

4. Post-Exploitation Impact:

• Privilege Escalation: The attacker gains SYSTEM or elevated administrative privileges, allowing full control of the endpoint.
• Persistence: The attacker can install persistent backdoors, modify boot configurations, or create hidden accounts.
• Lateral Movement: From an elevated endpoint, the attacker can harvest credentials (SAM, LSASS, cached domain credentials) and pivot to other systems in the domain.
• Data Exfiltration: Full confidentiality impact (C:H) enables access to encrypted files, emails, and business data.
• Availability Impact: The attacker can destroy or encrypt data (matching A:H), or disable critical services.

No public PoC available; attack chain is inferred from vulnerability class. The plausibility of this chain is supported by the fact that dock-management tools commonly operate with elevated privileges and rely on background services to communicate with docking hardware.

Impact Assessment

Business Impact: Lenovo Dock Manager is a client-side utility deployed on enterprise endpoints that use Lenovo docking stations — a common configuration in corporate offices, development labs, and government agencies. A successful local privilege escalation (LPE) on a single endpoint can lead to full domain compromise when combined with credential harvesting and lateral movement. The CVSS 7.8 score reflects High severity due to full CIA impact (C:H/I:H/A:H) and no requirement for user interaction.

Affected Systems: Any Windows endpoint with Lenovo Dock Manager installed. The exact affected version range is unknown because the vendor has not published an advisory (Patch Confidence 0/4). Enterprises using Lenovo ThinkPad, ThinkCentre, or ThinkStation devices with docking stations are presumed at risk.

Blast Radius:

• Single Endpoint: Full OS compromise with SYSTEM privileges.
• Domain-Wide: If the endpoint is domain-joined and the attacker harvests domain admin credentials, the entire Active Directory environment is at risk.
• Data Exposure: Confidential documents, credentials, and intellectual property stored on the compromised device are at risk (C:H).
• Operational Impact: Dock Manager services can be destabilized, potentially breaking dock functionality and causing availability issues (A:H).

CVSS Subscore Analysis:

• AV:L — The attack is local-only, reducing the threat of remote exploitation.
• AC:L — No special conditions or race-window timing are needed.
• PR:L — A standard user account suffices; no admin rights needed to trigger.
• UI:N — The victim does not need to click anything or open a malicious file.
• C:H/I:H/A:H — Full compromise; the attacker can read, modify, or destroy all data accessible to the elevated process.

Detection Guidance

Detection for this vulnerability is challenging because the flaw is static (no network-based exploit trigger) and the exploitation occurs through legitimate Windows mechanisms (service start, DLL load, file modification). The following rules target the behavioral indicators of privilege escalation.

Sigma Rule

title: Lenovo Dock Manager - Local Privilege Escalation via Improper Permissions
id: 5e8c2f4a-9b1d-4f6e-8a2c-5f7b1e9d3c44
status: experimental
description: Detects suspicious file modifications or process executions associated with Lenovo Dock Manager that indicate exploitation of CWE-276 (improper permissions).
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2026-63425
author: Valtersit Threat Intelligence
date: 2026/01/01
tags:
    - attack.privilege_escalation
    - attack.t1068
    - cve.2026.63425
logsource:
    category: process_creation
    product: windows
detection:
    selection_parent:
        ParentImage|contains:
            - 'Lenovo\DockManager'
    selection_dock_process:
        Image|contains:
            - 'Lenovo\DockManager'
    selection_elevated:
        IntegrityLevel:
            - 'S-1-16-12288'  # High integrity
            - 'S-1-16-16384'  # System integrity
    condition: selection_dock_process and selection_elevated and not selection_parent
level: high
falsepositives:
    - Legitimate Lenovo Dock Manager updates or scheduled tasks running with elevated privileges
    - IT-managed deployment scripts that modify Dock Manager files

YARA Rule

rule Lenovo_Dock_Manager_LPE_CVE_2026_63425
{
    meta:
        author = "Valtersit Threat Intelligence"
        description = "Detects suspicious binaries or scripts that may be planted in Lenovo Dock Manager directories for privilege escalation (CVE-2026-63425, CWE-276)."
        cve = "CVE-2026-63425"
        date = "2026-01-01"
        severity = "high"
    strings:
        $s1 = "Lenovo" nocase
        $s2 = "DockManager" nocase
        $s3 = "SYSTEM" nocase
        $s4 = "cmd.exe /c" nocase
        $s5 = "powershell.exe" nocase
        $s6 = "whoami" nocase
        $s7 = "net user" nocase
        $s8 = "sc create" nocase
        $s9 = "reg add" nocase
    condition:
        uint16(0) == 0x5A4D and            // MZ header (PE binary)
        (1 of ($s*) and                      // at least one relevant string
         (#s1 > 2 and #s2 > 2)) or           // mentions Lenovo DockManager 
        (filesize < 2MB and 3 of ($s*))      // small suspicious scripts
}

Suricata IDS Rule

alert tcp any any -> any any (msg:"CVE-2026-63425 - Lenovo Dock Manager LPE - Suspicious SMB File Write to Admin Share"; flow:established,to_server; content:"|ff 53 4d 42|"; offset:4; depth:4; content:"|2e|"; content:"ADMIN"; content:"$"; content:"lenovo"; nocase; content:"dockmanager"; nocase; classtype:attempted-admin; sid:202663425; rev:1; reference:cve,2026-63425;)

Note: Because CVE-2026-63425 is a local privilege escalation requiring no network trigger, network-based detection has limited applicability. This rule targets the uncommon scenario where a remote attacker stages a payload via SMB to the Dock Manager directory (e.g., via PsExec or admin share). Analysts should prioritize endpoint-based detection rules (Sigma, Elastic, Wazuh).

Elastic Detection

// EQL query for Elastic Security
// Detects process creation from Lenovo Dock Manager directory with high integrity level
process where
  event.category == "process" and
  process.executable : "*Lenovo*DockManager*" and
  process.Ext.integrity_level in ("High", "System") and
  not process.parent.executable : "*Lenovo*DockManager*" and
  (process.args : ("cmd.exe", "powershell.exe", "wmic.exe", "net.exe") or
   process.command_line : ("*whoami*", "*net user*", "*reg add*", "*sc create*"))

Splunk SPL Query

index=windows source="WinEventLog:Security" OR source="WinEventLog:System" OR sourcetype="WinEventLog:Security"
| search (Image="*Lenovo*DockManager*" OR NewProcessName="*Lenovo*DockManager*")
| search IntegrityLevel="High" OR IntegrityLevel="System"
| eval is_suspicious = case(
    match(CommandLine, "(?i)whoami"), 1,
    match(CommandLine, "(?i)net user"), 1,
    match(CommandLine, "(?i)reg add"), 1,
    match(CommandLine, "(?i)sc create"), 1,
    1 = 1, 0)
| where is_suspicious = 1
| table _time, host, user, Image, CommandLine, ParentImage, IntegrityLevel
| sort - _time

Wazuh OSSEC Rule

<group name="lenovo_dockmanager,">
    <!-- Detect file changes in Lenovo Dock Manager directory (suspicious for CVE-2026-63425) -->
    <rule id="100625" level="12">
        <if_sid>550</if_sid>
        <field name="file">\.*Lenovo\DockManager\.*</field>
        <description>CVE-2026-63425 - Suspicious file modification in Lenovo Dock Manager directory</description>
        <group>privilege_escalation,</group>
        <mitre>
            <id>T1068</id>
        </mitre>
    </rule>

    <!-- Detect process execution from Lenovo Dock Manager with admin privileges -->
    <rule id="100626" level="12">
        <if_sid>571</if_sid>  <!-- sysmon process creation -->
        <field name="win.eventdata.image">\.*Lenovo\DockManager\.*</field>
        <field name="win.eventdata.integrityLevel">System|High</field>
        <description>CVE-2026-63425 - Lenovo Dock Manager process running at elevated integrity</description>
        <group>privilege_escalation,</group>
        <mitre>
            <id>T1068</id>
        </mitre>
    </rule>
</group>

Mitigation & Patch Guidance

Patch Status: Patch Confidence 0/4 — UNPATCHED. No vendor advisory, no firmware update, no hotfix, and no security bulletin from Lenovo has been identified by any tracked source as of this report. The NVD references "N/A" for vendor fix.

1. Immediate Mitigations (until a patch is available):

• Audit and Restrict Permissions: Manually review and tighten NTFS ACLs on the Lenovo Dock Manager installation directory (typically under C:\Program Files\Lenovo\). Remove BUILTIN\Users and Everyone write/modify rights. Use icacls from an elevated command prompt: icacls "C:\Program Files\Lenovo\DockManager" /inheritance:r /grant:r "BUILTIN\Administrators:F" "SYSTEM:F" "CREATOR OWNER:F".
• Audit Service DACLs: Run sc.exe sdshow <dockmanager-service-name> to review service permissions. Ensure only SYSTEM and Administrators have SERVICE_CHANGE_CONFIG and SERVICE_START rights.
• Disable or Remove Dock Manager if Not Required: If the organization does not require Dock Manager's advanced features, consider disabling the service or uninstalling the application entirely. Docking stations will still function at the hardware level using in-box Windows drivers.
• Application Whitelisting: Deploy AppLocker or Windows Defender Application Control (WDAC) to block execution of any binary from the Dock Manager directory unless it is signed by Lenovo.
• Local Admin Rights Hygiene: Minimize the number of users with local administrative rights; while this vulnerability does not require admin rights, reducing the blast radius of post-exploitation lateral movement is critical.

2. Patch / Upgrade Steps:

• Monitor the Lenovo Support Portal (https://support.lenovo.com) for a security advisory for Lenovo Dock Manager.
• Subscribe to Lenovo security advisory RSS feeds and the NVD CVE feed for CVE-2026-63425.
• When a patch is released, deploy through the organization's patch management solution (e.g., SCCM, Intune, WSUS) with a priority of "Critical" given the 7.8 CVSS score.
• Test the patch in a pilot group of endpoints with docking stations before broad deployment.

3. Long-Term Hardening:

• Standardize Endpoint Configuration: Use Group Policy or Intune to enforce least-privilege file permissions for all applications installed on endpoints.
• Enable PowerShell Logging and Sysmon: Deploy Sysmon (Event ID 1 for process creation, Event ID 11 for file create) with configuration that monitors writes to program file directories.
• Harden Local Accounts: Enforce strong local account passwords, LAPS for domain-joined devices, and disable default RID 500 accounts where possible.
• Audit Logon Events: Continuously monitor for anomalous local logons (Event ID 4624 type 3 or 10) and privilege escalation events (Event ID 4672).
• Baseline Imaging: Include permission audits as part of the endpoint build and patch management lifecycle.

References

1. NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2026-63425 — Official CVE record (CVSS 7.8, CWE-276, sparse description).
2. Lenovo Support Portal: https://support.lenovo.com — Monitor for forthcoming security advisory for Lenovo Dock Manager. No advisory published as of this report.
3. MITRE ATT&CK: https://attack.mitre.org/techniques/T1068/ — "Exploitation for Privilege Escalation" technique mapping.
4. MITRE CWE-276: https://cwe.mitre.org/data/definitions/276.html — "Incorrect Default Permissions" weakness description.
5. CISA Known Exploited Vulnerabilities Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog — CVE-2026-63425 is NOT listed (no known in-the-wild exploitation as of this report).

Threat Actor Activity: No known threat actor campaigns have been publicly associated with CVE-2026-63425 as of this writing. The vulnerability was discovered during an internal security assessment (per NVD description), suggesting it is not yet weaponized in known malware frameworks. However, the vulnerability class (improper permissions) is a historically favored LPE vector among commodity malware and ransomware operators; if a public PoC emerges, we assess moderate-to-high likelihood of adoption by cybercriminal groups targeting enterprise endpoints. The "Patch Confidence 0/4" status means the exposure window remains open indefinitely.