CVE-2025-12047: Lenovo Scanner Pro Information Disclosure

CVE-2025-12047 Overview

CVE-2025-12047 is an improper certificate validation vulnerability [CWE-295] in the Lenovo Scanner Pro application. Lenovo identified the issue during an internal security assessment. An attacker on the same logical network can, under certain conditions, disclose sensitive user files handled by the application.

The flaw carries a CVSS 4.0 base score of 6.0 (MEDIUM). Exploitation requires adjacent-network access and higher attack complexity but no authentication or user interaction. Impact is limited to confidentiality of application data. No public exploit or CISA KEV listing exists for this issue at the time of publication.

Critical Impact
An adjacent-network attacker can intercept Lenovo Scanner Pro traffic and disclose sensitive user files transmitted by the application.

Affected Products

Lenovo Scanner Pro application
Deployments operating on shared or untrusted logical networks
Endpoints where Scanner Pro handles sensitive user files

Discovery Timeline

2025-11-12 - CVE-2025-12047 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-12047

Vulnerability Analysis

The vulnerability resides in how the Lenovo Scanner Pro application validates TLS certificates during network communication. Improper certificate validation [CWE-295] allows an adversary positioned on the same logical network to present a fraudulent certificate that the client accepts as trusted. Once trust is established, the attacker can intercept, decrypt, or manipulate application traffic.

Because Scanner Pro processes user files, the confidentiality impact extends to any documents or scan output routed through the affected communication channel. The vulnerability does not permit modification of data on the host or downstream systems, and integrity and availability remain unaffected according to the CVSS vector.

Exploitation requires the attacker to occupy a network position that can observe or influence Scanner Pro traffic, such as a shared Wi-Fi segment or compromised LAN device. The higher attack complexity reflects the need to time interception with an active Scanner Pro session and satisfy specific preconditions in the validation logic.

Root Cause

The root cause is inadequate validation of X.509 certificates presented to the Scanner Pro client. Missing checks on certificate chain, hostname, or trust anchor let an attacker-controlled certificate pass verification, breaking the guarantees that TLS is expected to provide.

Attack Vector

The attack vector is Adjacent Network. The adversary must sit on the same logical network segment as the victim and perform an active machine-in-the-middle (MITM) attack against Scanner Pro sessions. No credentials and no user interaction are required.

No verified proof-of-concept code is available. Refer to the Lenovo Knowledge Base Article for vendor-provided technical details.

Detection Methods for CVE-2025-12047

Indicators of Compromise

Unexpected TLS certificates presented to Scanner Pro clients that do not chain to a recognized Lenovo or enterprise trust anchor.
ARP cache anomalies or duplicate MAC addresses on segments where Scanner Pro endpoints operate, indicating possible MITM activity.
Outbound Scanner Pro connections to IP addresses or hostnames that deviate from documented Lenovo endpoints.

Detection Strategies

Inspect TLS handshakes from Scanner Pro hosts and alert on self-signed or untrusted issuer certificates.
Correlate application traffic with network-layer telemetry to detect certificate substitution or downgrade attempts.
Baseline normal Scanner Pro connection destinations and flag deviations for review.

Monitoring Recommendations

Enable full packet capture on segments hosting Scanner Pro during high-risk periods such as guest network usage.
Monitor DHCP and ARP tables for rogue devices announcing themselves as gateways or DNS resolvers.
Aggregate endpoint and network logs in a centralized SIEM to correlate certificate anomalies with user activity.

How to Mitigate CVE-2025-12047

Immediate Actions Required

Apply the vendor guidance published in the Lenovo Knowledge Base Article as soon as it is available for your deployment.
Restrict Scanner Pro usage to trusted, segmented networks until patched builds are installed on all endpoints.
Inventory systems running Scanner Pro and prioritize those on shared or guest network segments.

Patch Information

Lenovo has published remediation guidance through its knowledge base. Administrators should consult the Lenovo Knowledge Base Article for the fixed version and update procedure for the Scanner Pro application.

Workarounds

Require Scanner Pro users to connect only through corporate networks that enforce certificate pinning or inspection.
Disable Scanner Pro on endpoints that regularly join untrusted Wi-Fi networks such as hotels or airports.
Enforce VPN tunneling for any Scanner Pro traffic that traverses networks outside administrative control.

bash

# Configuration example
# Restrict Scanner Pro network exposure via host firewall (Windows)
netsh advfirewall firewall add rule name="Block ScannerPro on Public" \
  program="C:\Program Files\Lenovo\ScannerPro\ScannerPro.exe" \
  dir=out profile=public action=block