CVE-2023-30799: MikroTik RouterOS Privilege Escalation Flaw

CVE-2023-30799 Overview

CVE-2023-30799 is a privilege escalation vulnerability affecting MikroTik RouterOS, a widely deployed operating system powering MikroTik network routers and devices. The vulnerability allows a remote, authenticated attacker to escalate privileges from admin to super-admin through the Winbox or HTTP interface. Once elevated privileges are obtained, the attacker can execute arbitrary code on the affected system, potentially leading to complete device compromise.

Critical Impact

Authenticated attackers can escalate from admin to super-admin privileges, enabling arbitrary code execution on vulnerable MikroTik devices through Winbox or HTTP interfaces.

Affected Products

• MikroTik RouterOS stable versions before 6.49.7
• MikroTik RouterOS long-term (LTR) versions through 6.48.6
• All MikroTik devices running vulnerable RouterOS firmware

Discovery Timeline

• 2023-07-19 - CVE-2023-30799 published to NVD
• 2025-11-21 - Last updated in NVD database

Technical Details for CVE-2023-30799

Vulnerability Analysis

This vulnerability represents a privilege escalation flaw within MikroTik RouterOS that stems from improper privilege management (CWE-269). The vulnerability specifically targets the authentication and authorization mechanisms present in the Winbox management interface and the HTTP web interface. An attacker who has already obtained valid admin-level credentials can exploit this vulnerability to elevate their privileges to super-admin status, which grants complete control over the router's configuration and underlying system.

The vulnerability is particularly concerning given the widespread deployment of MikroTik devices in enterprise networks, ISP infrastructure, and as customer premises equipment. MikroTik routers are frequently deployed in perimeter network positions, making successful exploitation a potential gateway for broader network compromise.

Root Cause

The root cause of CVE-2023-30799 is classified as Improper Privilege Management (CWE-269). The vulnerability exists because the RouterOS authentication system fails to properly enforce privilege boundaries between admin and super-admin roles. This architectural weakness allows authenticated admin users to bypass intended access restrictions and gain elevated super-admin privileges, which should normally be restricted to a more limited set of operations.

Attack Vector

The attack is network-based and requires the attacker to have prior authentication to the target device with admin-level credentials. The exploitation flow involves:

1. The attacker authenticates to the MikroTik device using valid admin credentials via either the Winbox interface or the HTTP management interface
2. The attacker exploits the privilege management flaw to escalate from admin to super-admin
3. With super-admin privileges, the attacker can execute arbitrary code on the underlying system
4. This code execution capability enables persistence mechanisms, backdoor installation, or lateral movement within the network

The FOISted repository on GitHub provides additional technical context about this vulnerability class affecting MikroTik devices. Further details are available in the VulnCheck Security Advisory.

Detection Methods for CVE-2023-30799

Indicators of Compromise

• Unexpected configuration changes on MikroTik devices, particularly new user accounts or modified access permissions
• Suspicious login activity from admin accounts followed by actions typically restricted to super-admin users
• Unusual processes or scripts executing on the RouterOS system that were not authorized by administrators
• Evidence of privilege escalation in device logs showing admin accounts performing super-admin operations

Detection Strategies

• Implement logging and monitoring for all authentication events on MikroTik devices, with alerts for privilege elevation
• Deploy network detection rules to identify anomalous Winbox protocol traffic or unusual HTTP requests to management interfaces
• Utilize SentinelOne Singularity to monitor network traffic patterns and detect exploitation attempts targeting MikroTik management protocols
• Regularly audit RouterOS user accounts and privilege assignments to detect unauthorized super-admin access

Monitoring Recommendations

• Enable comprehensive logging on all MikroTik devices and forward logs to a centralized SIEM for correlation and analysis
• Monitor for unexpected firmware modifications or configuration exports that could indicate attacker persistence
• Implement network segmentation to restrict management interface access to authorized administrative networks only

How to Mitigate CVE-2023-30799

Immediate Actions Required

• Upgrade all MikroTik RouterOS stable installations to version 6.49.7 or later immediately
• Upgrade all MikroTik RouterOS long-term (LTR) installations to versions newer than 6.48.6
• Audit existing admin accounts and rotate all credentials as a precautionary measure
• Restrict management interface access using firewall rules to limit exposure to trusted networks only

Patch Information

MikroTik has addressed this vulnerability in RouterOS stable version 6.49.7 and in long-term releases after 6.48.6. Organizations should prioritize patching all affected devices, particularly those exposed to untrusted networks or the internet. Firmware updates can be obtained through the official MikroTik download portal or via the RouterOS auto-update mechanism. Ensure firmware integrity by verifying downloads through official MikroTik channels.

Workarounds

• Disable Winbox and HTTP management interfaces on devices where they are not required
• Implement strict IP-based access control lists (ACLs) to limit management access to specific trusted hosts
• Enable two-factor authentication where supported to add an additional layer of protection for admin accounts
• Place MikroTik management interfaces behind a VPN or jump host to reduce direct exposure

# Example: Restrict Winbox and HTTP access to management subnet only
/ip firewall filter
add chain=input src-address=192.168.1.0/24 protocol=tcp dst-port=8291 action=accept comment="Allow Winbox from management network"
add chain=input src-address=192.168.1.0/24 protocol=tcp dst-port=80 action=accept comment="Allow HTTP from management network"
add chain=input protocol=tcp dst-port=8291 action=drop comment="Block Winbox from all other sources"
add chain=input protocol=tcp dst-port=80 action=drop comment="Block HTTP from all other sources"