CVE-2025-10495: Lenovo Client Applications RCE Flaw

CVE-2025-10495 Overview

CVE-2025-10495 affects multiple Lenovo client applications, including Lenovo PC Manager, Lenovo App Store, Lenovo Browser, and Lenovo Legion Zone. The vulnerability stems from improper certificate validation [CWE-295]. An attacker positioned on the same logical network can leverage this weakness to execute arbitrary code on a targeted host under specific conditions.

Critical Impact
Adjacent network attackers can intercept update or communication traffic and deliver malicious payloads that execute with the privileges of the affected Lenovo client applications.

Affected Products

Lenovo PC Manager
Lenovo App Store
Lenovo Browser
Lenovo Legion Zone

Discovery Timeline

2025-11-12 - CVE-2025-10495 published to NVD
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-10495

Vulnerability Analysis

The affected Lenovo client applications fail to properly validate the X.509 certificates presented by remote services during secure communications. This class of weakness, tracked as [CWE-295] Improper Certificate Validation, breaks the trust assumptions of Transport Layer Security (TLS). When clients do not verify certificate chains, hostnames, or pinned identities, attackers can impersonate trusted endpoints.

Lenovo categorizes the issue as high severity. The attack vector requires adjacency on the same logical network, meaning the attacker must share a broadcast domain, VLAN, or Wi-Fi segment with the victim. Authentication is not required, and no user interaction is needed to trigger the flaw.

Root Cause

The applications accept TLS certificates without enforcing complete chain-of-trust validation. This may include accepting expired certificates, self-signed certificates, certificates issued by untrusted authorities, or certificates whose subject names do not match the expected service. Without strict validation, the encrypted channel provides confidentiality from passive observers but no authenticity guarantees against an active attacker.

Attack Vector

An attacker on the same logical network performs a machine-in-the-middle (MITM) attack against client traffic generated by the affected Lenovo applications. Common positioning techniques include Address Resolution Protocol (ARP) spoofing, rogue Dynamic Host Configuration Protocol (DHCP) servers, malicious Wi-Fi access points, or DNS poisoning on the local segment. Once traffic is intercepted, the attacker presents a forged certificate that the vulnerable client accepts. The attacker then substitutes update manifests, installer binaries, or application payloads, leading to arbitrary code execution in the context of the Lenovo client.

No public proof-of-concept is referenced in the advisory. Refer to the Lenovo Security Advisory #434328 for vendor-specific technical details.

Detection Methods for CVE-2025-10495

Indicators of Compromise

Unexpected child processes spawned by Lenovo client executables such as LenovoPCManager.exe, LenovoBrowser.exe, or LegionZone.exe.
Outbound TLS connections from Lenovo applications terminating at non-Lenovo IP ranges or unexpected hostnames.
Modified or unsigned binaries appearing in Lenovo application installation directories shortly after a network connection event.

Detection Strategies

Monitor process lineage for Lenovo client applications writing or executing files outside their normal installation paths.
Inspect network metadata for TLS sessions where Lenovo client traffic is presented with certificates not issued by Lenovo's expected certificate authorities.
Alert on local ARP table anomalies or duplicate gateway MAC addresses on subnets hosting affected endpoints.

Monitoring Recommendations

Centralize endpoint and network telemetry to correlate adjacent-network anomalies with Lenovo client process activity.
Track update download events from Lenovo applications and validate digital signatures of downloaded artifacts.
Enable continuous monitoring of code-signing certificates on binaries executed by Lenovo update mechanisms.

How to Mitigate CVE-2025-10495

Immediate Actions Required

Apply the updated versions of Lenovo PC Manager, Lenovo App Store, Lenovo Browser, and Lenovo Legion Zone as published in Lenovo Security Advisory #434328.
Inventory endpoints running the affected Lenovo applications and prioritize remediation on laptops that connect to untrusted networks.
Restrict use of affected applications on shared Wi-Fi or guest network segments until patches are deployed.

Patch Information

Lenovo has issued fixed builds for the affected client applications. Consult the Lenovo Security Advisory #434328 for the specific patched versions and download locations. Deploy updates through managed software distribution channels where available.

Workarounds

Require corporate users to connect through trusted networks or a Virtual Private Network (VPN) until updates are installed.
Disable automatic update functionality in affected Lenovo applications where business requirements permit.
Segment endpoints from untrusted hosts on the local network using host-based firewall rules that limit broadcast and multicast exposure.

bash

# Example: block outbound traffic from affected Lenovo apps until patched (Windows PowerShell)
New-NetFirewallRule -DisplayName "Block LenovoPCManager" -Direction Outbound -Program "C:\Program Files\Lenovo\LenovoPCManager\LenovoPCManager.exe" -Action Block
New-NetFirewallRule -DisplayName "Block LenovoLegionZone" -Direction Outbound -Program "C:\Program Files\Lenovo\LegionZone\LegionZone.exe" -Action Block