CVE-2024-22246: VMware SD-WAN Edge RCE Vulnerability

CVE-2024-22246 Overview

CVE-2024-22246 is an unauthenticated command injection vulnerability affecting VMware SD-WAN Edge. A malicious actor with local access to the Edge Router UI during activation can inject arbitrary commands into the underlying system. Successful exploitation may lead to full control of the router and remote code execution on the appliance.

The flaw is classified under [CWE-77] (Improper Neutralization of Special Elements used in a Command). VMware disclosed the issue in advisory VMSA-2024-0008. While exploitation requires local access and high attack complexity, a successful attack yields high impact to confidentiality, integrity, and availability.

Critical Impact
An attacker with local UI access during activation can execute arbitrary commands and gain full administrative control of the SD-WAN Edge router.

Affected Products

VMware SD-WAN Edge (Edge Router UI during activation)
Refer to VMware Security Advisory VMSA-2024-0008 for specific affected versions
Deployments where the Edge Router UI is reachable to local actors during the activation window

Discovery Timeline

2024-04-02 - CVE-2024-22246 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-22246

Vulnerability Analysis

The vulnerability resides in the VMware SD-WAN Edge Router UI activation workflow. During activation, the UI accepts input that is passed to an underlying command handler without proper neutralization of shell metacharacters. An attacker who can reach the activation interface locally can supply crafted input that breaks out of the intended command context.

Because activation runs with elevated privileges on the Edge appliance, injected commands execute in a privileged context. This enables the attacker to modify configuration, extract secrets, pivot into the SD-WAN control plane, or establish persistence on the router. The attack does not require authentication, which lowers the bar for exploitation once local UI access is achieved.

Root Cause

The root cause is improper neutralization of special elements passed to an OS command, tracked as [CWE-77]. Input received through the Edge Router UI during activation flows into command construction without sanitization or safe API usage. The absence of authentication on the activation UI compounds the flaw by removing a gating control on who can supply input.

Attack Vector

Exploitation requires local access to the Edge Router UI while the appliance is in the activation state. The attacker submits crafted parameters containing shell metacharacters through the UI. The backend concatenates the input into a shell command, causing the injected payload to execute with router privileges. See the VMware Security Advisory VMSA-2024-0008 for vendor technical details.

Detection Methods for CVE-2024-22246

Indicators of Compromise

Unexpected shell processes spawned by the Edge Router UI or activation service on SD-WAN Edge appliances
New or modified accounts, SSH keys, or cron jobs on Edge routers following an activation event
Outbound network connections from Edge appliances to unfamiliar IP addresses shortly after activation
Configuration changes to SD-WAN Edge devices that do not correlate with authorized administrator activity

Detection Strategies

Monitor Edge Router activation events and correlate them with process execution telemetry on the appliance
Alert on shell metacharacters (;, |, `, $()) appearing in activation UI request parameters captured by network sensors
Baseline normal activation-time process trees and flag deviations, especially the spawning of sh, bash, or nc

Monitoring Recommendations

Ingest SD-WAN Edge appliance and orchestrator logs into a central SIEM for retention and correlation
Restrict physical and network access to the Edge Router UI and log every session that reaches the activation interface
Enable alerting on privileged command execution originating from web UI service accounts on Edge devices

How to Mitigate CVE-2024-22246

Immediate Actions Required

Apply the fixes referenced in VMware Security Advisory VMSA-2024-0008 to all VMware SD-WAN Edge deployments
Limit local access to the Edge Router UI during activation to trusted personnel and trusted networks only
Audit recently activated Edge devices for signs of unauthorized command execution or configuration change

Patch Information

VMware has released updated SD-WAN Edge software addressing this vulnerability. Consult VMware Security Advisory VMSA-2024-0008 for fixed version numbers and upgrade guidance specific to your deployment.

Workarounds

Perform Edge activation only from isolated, physically secured management networks
Enforce out-of-band or console-based activation procedures where feasible to eliminate exposure of the UI
Reduce the activation window duration and disable the UI immediately after successful activation

bash

# Configuration example: restrict management access to the Edge UI
# Replace with your management subnet
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP