CVE-2026-50206: VPN Network Profile RCE Vulnerability

CVE-2026-50206 Overview

CVE-2026-50206 is a command injection vulnerability [CWE-78] affecting VPN network profile processing. The flaw stems from improper handling of special characters in incoming VPN profile settings. An attacker who delivers a crafted configuration file can inject and execute arbitrary operating system commands on the target host.

The issue is exploitable over an adjacent network and requires high privileges, but no user interaction. Successful exploitation impacts the confidentiality, integrity, and availability of the affected system. Acer has published a Knowledge Base advisory documenting the issue.

Critical Impact
A crafted VPN profile can trigger OS command execution through unsanitized special characters in profile settings, compromising the host system.

Affected Products

VPN profile processing component referenced in the Acer Community advisory
Specific product versions are not enumerated in the published NVD record
Refer to the vendor advisory for the authoritative list of affected builds

Discovery Timeline

2026-06-04 - CVE-2026-50206 published to the National Vulnerability Database (NVD)
2026-06-04 - Last updated in NVD database

Technical Details for CVE-2026-50206

Vulnerability Analysis

The vulnerability is classified under [CWE-78] Improper Neutralization of Special Elements used in an OS Command. The affected code path consumes VPN network profile settings supplied through configuration files. Values inside these profiles are passed to an operating system command interpreter without adequate sanitization or escaping.

When the parser encounters metacharacters such as backticks, semicolons, pipes, or $() constructs, the underlying shell interprets them as command separators or substitutions. This allows an attacker who controls the profile content to append arbitrary commands to legitimate operations. The injected commands execute in the security context of the process consuming the configuration file.

Because the attack vector is adjacent network, an attacker typically needs presence on the same logical network segment. The requirement for high privileges suggests the profile import path is reachable by a privileged user or service account rather than an unauthenticated remote attacker.

Root Cause

The root cause is missing input neutralization on fields read from VPN profile files. The application concatenates user-controllable strings into shell command lines instead of using parameterized APIs or strict allow-list validation of profile field contents.

Attack Vector

An attacker stages a malicious VPN profile containing shell metacharacters embedded in one or more configuration fields. The profile is delivered to the target through normal VPN configuration import workflows. When the host processes the profile, the embedded payload is executed by the shell, yielding command execution.

No verified proof-of-concept code has been published. Refer to the Acer Community Knowledge Base Article for vendor-supplied technical details.

Detection Methods for CVE-2026-50206

Indicators of Compromise

VPN profile files containing shell metacharacters such as ;, |, &, backticks, or $() inside profile name, server, or option fields
Unexpected child processes spawned by the VPN client or profile import service, such as cmd.exe, powershell.exe, or /bin/sh
New scheduled tasks, services, or persistence artifacts created shortly after a VPN profile import event

Detection Strategies

Inspect VPN configuration files at rest and in transit for non-printable or shell metacharacters in fields that should contain only hostnames, identifiers, or numeric values
Correlate VPN profile import events with subsequent process creation events from the importing binary
Flag command-line arguments to interpreters that contain strings sourced from VPN profile parsing components

Monitoring Recommendations

Enable process creation auditing and capture parent-child relationships for the VPN client process tree
Forward VPN client and configuration service logs to a centralized log platform for retention and correlation
Alert on file writes to VPN profile directories from non-administrative users or unexpected sources

How to Mitigate CVE-2026-50206

Immediate Actions Required

Review the Acer Community Knowledge Base Article and apply vendor-supplied updates as soon as they are available
Restrict write access to VPN profile directories to administrators and trusted provisioning systems
Audit existing VPN profiles for unexpected metacharacters in configuration fields

Patch Information

The vendor advisory referenced in the NVD entry is hosted on the Acer Community Knowledge Base. Administrators should consult that advisory for the patched version, build identifiers, and any required configuration changes following the update.

Workarounds

Disable or restrict import of externally supplied VPN profiles until the patch is applied
Source VPN configurations only from trusted internal provisioning systems with integrity checks
Enforce least privilege on accounts authorized to import VPN profiles, reducing the impact of successful command injection

bash

# Configuration example
# Restrict VPN profile directory permissions (Linux example)
chown root:root /etc/vpn/profiles
chmod 750 /etc/vpn/profiles
find /etc/vpn/profiles -type f -exec chmod 640 {} \;