CVE-2026-12267: ManageEngine DDI Central RCE Vulnerability

CVE-2026-12267 Overview

CVE-2026-12267 is a command injection vulnerability in ManageEngine DDI Central versions below 6201. The flaw resides in the Windows DNS Query Resolution Policy name field, where unsanitized input is passed to an underlying system command interpreter. An authenticated attacker with high-privilege access can inject operating system commands and achieve remote code execution on the host running DDI Central. The weakness is categorized under CWE-20: Improper Input Validation.

Critical Impact

Successful exploitation grants arbitrary command execution on the DDI Central server, compromising confidentiality, integrity, and availability of DNS, DHCP, and IPAM services managed by the platform.

Affected Products

• ManageEngine DDI Central versions below build 6201
• Windows deployments exposing the DNS Query Resolution Policy configuration interface
• Environments where DDI Central manages Windows DNS infrastructure

Discovery Timeline

• 2026-09-28 - CVE-2026-12267 published to the National Vulnerability Database
• 2026-09-29 - Last updated in NVD database

Technical Details for CVE-2026-12267

Vulnerability Analysis

The vulnerability exists in the policy configuration workflow of ManageEngine DDI Central. When an administrator creates or edits a Windows DNS Query Resolution Policy, the application accepts the policy name as user-controlled input. The platform forwards this value to a backend process that invokes Windows DNS management commands without proper sanitization or parameterization.

Because the name field is concatenated into a shell or PowerShell command string, metacharacters are interpreted by the command processor. An attacker can append shell operators to the policy name and execute arbitrary binaries in the context of the DDI Central service account. Given that DDI Central typically runs with elevated privileges to manage DNS infrastructure, the resulting code execution often provides broad control over the host.

Root Cause

The root cause is improper input validation [CWE-20] in the policy name handler. The application neither restricts the character set permitted in policy names nor uses safe command invocation patterns such as argument arrays or prepared parameters. This design allows injected shell metacharacters to break out of the intended argument context.

Attack Vector

Exploitation requires network access to the DDI Central management interface and authenticated access with privileges to configure DNS Query Resolution Policies. The attacker submits a crafted policy name containing shell metacharacters and injected commands through the policy creation or modification endpoint. When the backend processes the policy, the injected commands execute on the server. See the ManageEngine Security Updates advisory for the vendor description of the affected workflow.

Detection Methods for CVE-2026-12267

Indicators of Compromise

• Unusual DNS Query Resolution Policy entries containing shell metacharacters such as ;, |, &, backticks, or $() in the name field
• Child processes such as cmd.exe, powershell.exe, or wscript.exe spawned by the DDI Central Java or service process
• Outbound network connections initiated by the DDI Central host to unexpected destinations shortly after policy configuration events
• New scheduled tasks, services, or local accounts created on the DDI Central server without change-management records

Detection Strategies

• Review DDI Central audit logs for policy creation and modification events, correlating the policy name field against metacharacter patterns
• Monitor endpoint telemetry for process ancestry where the DDI Central service is the parent of command interpreters
• Alert on anomalous outbound traffic from the DDI Central host, particularly to non-ManageEngine infrastructure

Monitoring Recommendations

• Enable detailed Windows process creation auditing (Event ID 4688) on DDI Central servers and forward to a centralized analytics platform
• Baseline normal administrative activity in DDI Central and alert on deviations in configuration frequency or user context
• Track authentication events for accounts with DNS policy configuration privileges, flagging unusual source addresses or off-hours activity

How to Mitigate CVE-2026-12267

Immediate Actions Required

• Upgrade ManageEngine DDI Central to build 6201 or later as published in the vendor security updates
• Restrict network access to the DDI Central management interface to trusted administrative networks only
• Review and rotate credentials for any administrative accounts with DNS policy configuration privileges
• Audit existing DNS Query Resolution Policies for suspicious names and remove unauthorized entries

Patch Information

Zoho ManageEngine addressed CVE-2026-12267 in DDI Central build 6201. Apply the fixed version from the ManageEngine Security Updates page. Confirm the installed build version through the DDI Central administrative console after patching.

Workarounds

• Limit DNS policy configuration privileges to a minimal set of trusted administrators until the patch is applied
• Place the DDI Central management interface behind a reverse proxy or VPN with strict access controls
• Enable application-layer logging and tamper-evident audit forwarding to detect exploitation attempts prior to upgrade

# Verify installed DDI Central build and restrict management access
# 1. Check current build via the About page or installation manifest
# 2. Example Windows firewall rule limiting the DDI Central web port to a management subnet
New-NetFirewallRule -DisplayName "DDI Central Mgmt Restrict" `
  -Direction Inbound -Protocol TCP -LocalPort 8443 `
  -RemoteAddress 10.10.50.0/24 -Action Allow