CVE-2026-15929: LG SmartShare SQL Injection Vulnerability

CVE-2026-15929 Overview

CVE-2026-15929 is a SQL injection vulnerability affecting LG Electronics SmartShare media sharing software. The flaw stems from improper neutralization of special elements used in SQL commands [CWE-89]. LG SmartShare versions through 2.3.1712.1202 running on Microsoft Windows 10 and earlier are affected. Attackers on an adjacent network can inject crafted SQL statements to compromise data confidentiality. The issue carries a CVSS 4.0 base score of 7.1 (HIGH) with an adjacent network attack vector, no privileges required, and no user interaction.

Critical Impact
An unauthenticated attacker on an adjacent network can execute arbitrary SQL statements against the SmartShare database, exposing sensitive information from the host system.

Affected Products

LG Electronics SmartShare through version 2.3.1712.1202
Microsoft Windows 10 host installations
Earlier Windows versions supporting SmartShare

Discovery Timeline

2026-07-30 - CVE-2026-15929 published to NVD
2026-07-30 - Last updated in NVD database

Technical Details for CVE-2026-15929

Vulnerability Analysis

LG SmartShare is a media streaming utility that shares content between LG devices and Windows hosts using DLNA and UPnP protocols. The application maintains a local SQL database to catalog media assets and manage sharing sessions. The vulnerability resides in SmartShare's query construction logic, where user-controllable input reaches SQL statements without adequate sanitization.

An attacker on the same local network segment can send crafted requests to the SmartShare service. Because the service accepts input from adjacent network peers by design, no authentication or user interaction is required to reach the vulnerable code path. Successful exploitation yields high impact to confidentiality, allowing attackers to read database contents that may include file paths, device identifiers, and cached metadata.

Root Cause

The root cause is a classic failure to neutralize SQL metacharacters in query strings [CWE-89]. Input from network peers is concatenated directly into SQL statements rather than passed through parameterized queries or prepared statements. Special characters such as single quotes, semicolons, and comment sequences alter the intended query logic and enable unauthorized data retrieval.

Attack Vector

Exploitation requires network adjacency, typically meaning the attacker resides on the same Wi-Fi network, VLAN, or broadcast domain as the target. The attacker sends malformed protocol messages to the SmartShare service listening on the host. No credentials are needed. See the LG Security Bulletin for vendor-provided technical detail.

No public proof-of-concept exploit code is currently available for CVE-2026-15929. The vulnerability mechanism is described in prose because no verified exploit sample has been published.

Detection Methods for CVE-2026-15929

Indicators of Compromise

Unexpected SmartShare service traffic originating from unfamiliar LAN peers on DLNA/UPnP ports
Malformed protocol requests containing SQL metacharacters such as ', --, ;, or UNION
Anomalous read activity against SmartShare's local database files on the Windows host
SmartShare service crashes or repeated restarts correlated with inbound network activity

Detection Strategies

Inspect network traffic to SmartShare listeners for payloads containing SQL keywords and metacharacters
Monitor process telemetry for the SmartShare service performing unusual database file access patterns
Correlate host-based events with adjacent-network source addresses that are not on an approved media-device list
Alert on SmartShare child processes spawning shells or scripting interpreters

Monitoring Recommendations

Enable Windows Firewall logging for inbound connections to SmartShare ports and forward logs to a SIEM
Baseline normal DLNA/UPnP activity on the network and alert on deviations
Track SmartShare binary versions across the fleet to identify unpatched hosts running 2.3.1712.1202 or earlier

How to Mitigate CVE-2026-15929

Immediate Actions Required

Uninstall LG SmartShare on hosts where the media sharing functionality is not required
Restrict network access to SmartShare service ports using Windows Firewall or network segmentation
Isolate Windows 10 and earlier systems running SmartShare from untrusted Wi-Fi and guest networks
Review LG's advisory and apply any vendor-provided update once available

Patch Information

Refer to the LG Security Bulletin for the authoritative list of fixed versions and update instructions. LG SmartShare versions through 2.3.1712.1202 are confirmed vulnerable. Given that the affected platform includes Windows 10 and earlier, organizations should also validate operating system support status before deploying updates.

Workarounds

Disable the SmartShare service via services.msc when media sharing is not actively used
Block inbound traffic to SmartShare listening ports at the host firewall for all non-trusted subnets
Place media sharing hosts on a dedicated VLAN segregated from workstation and server networks
Remove the SmartShare software entirely if no business requirement exists

bash

# Configuration example: block adjacent network access to SmartShare on Windows
netsh advfirewall firewall add rule name="Block SmartShare Inbound" ^
    dir=in action=block program="C:\Program Files (x86)\LG Electronics\SmartShare\SmartShare.exe" ^
    enable=yes profile=any

# Stop and disable the SmartShare service
sc stop "LGSmartShareService"
sc config "LGSmartShareService" start=disabled