CVE-2025-14772: ABB T-MAC Plus Auth Bypass Vulnerability

CVE-2025-14772 Overview

CVE-2025-14772 is an authorization bypass vulnerability in ABB T-MAC Plus version 4.0-24. The flaw, classified as Insecure Direct Object Reference [CWE-639], allows an authenticated low-privilege attacker to manipulate a user-controlled key to access or modify resources belonging to other users. ABB published a security advisory acknowledging the issue. The vulnerability is reachable over the network and requires low privileges with no user interaction.

Critical Impact
Authenticated attackers can bypass authorization checks to access or alter data outside their permission scope, undermining integrity and availability of the T-MAC Plus energy monitoring platform.

Affected Products

ABB T-MAC Plus version 4.0-24

Discovery Timeline

2026-06-03 - CVE-2025-14772 published to the National Vulnerability Database (NVD)
2026-06-03 - Last updated in NVD database

Technical Details for CVE-2025-14772

Vulnerability Analysis

The vulnerability is an Insecure Direct Object Reference (IDOR) condition in ABB T-MAC Plus. The application accepts a client-supplied identifier (the "user-controlled key") and uses it to retrieve or operate on backend objects without verifying that the authenticated session is authorized for that object. An attacker who already holds a valid low-privilege account can substitute identifiers in requests to read, modify, or invoke operations on data belonging to other tenants or administrators. The CWE-639 classification confirms the root issue is authorization logic tied to attacker-controllable parameters rather than session-bound entitlements.

Root Cause

The T-MAC Plus backend trusts identifiers supplied by the client when locating objects. Authorization is enforced based on authentication status rather than on per-object ownership or role-based access control. Because the key parameter is reflected directly into data-layer lookups, modifying it yields access to records the user should not see.

Attack Vector

Exploitation is performed over the network against the T-MAC Plus web or API interface. The attacker authenticates with any valid account, captures a legitimate request containing a resource identifier, and replays the request with modified identifier values. Successful exploitation impacts integrity and availability of monitored systems and can extend to subsystems that T-MAC Plus interacts with.

No public proof-of-concept exploit code is available. Refer to the ABB Security Document for vendor-supplied technical detail.

Detection Methods for CVE-2025-14772

Indicators of Compromise

Authenticated HTTP requests where object identifiers (numeric IDs, GUIDs, or tokens) increment or enumerate outside the user's normal range.
Successful 2xx responses to requests targeting resources that the requesting user has never previously accessed.
Unexpected modifications to T-MAC Plus configuration or metering data correlated with a single low-privilege session.

Detection Strategies

Inspect web server and application logs for sequential or randomized changes to identifier parameters within a single user session.
Correlate authentication identity with the resource owner field returned by the application to flag cross-tenant access.
Deploy web application firewall rules that baseline normal identifier ranges per user role and alert on deviations.

Monitoring Recommendations

Forward T-MAC Plus access logs to a centralized log platform and apply behavioral analytics on per-user object access patterns.
Alert on bursts of GET, PUT, or POST calls to the same endpoint with varying identifier parameters from one session.
Track administrative-level resource access initiated by non-administrative accounts.

How to Mitigate CVE-2025-14772

Immediate Actions Required

Apply the vendor-provided fix referenced in the ABB Security Document for T-MAC Plus 4.0-24.
Restrict network access to the T-MAC Plus management interface to trusted operator subnets only.
Audit existing user accounts and remove unused or excessive privileges to limit the blast radius of any authenticated abuse.
Review historical logs for evidence of cross-account identifier access prior to patch deployment.

Patch Information

ABB has published guidance for CVE-2025-14772 in its security advisory. Operators of T-MAC Plus 4.0-24 should consult the ABB Security Document for the remediated version and upgrade instructions.

Workarounds

Place T-MAC Plus behind a reverse proxy or VPN that enforces additional authentication and network-layer segmentation.
Disable accounts that are not strictly required for operational use, reducing the pool of credentials usable for authenticated exploitation.
Enable verbose audit logging on the T-MAC Plus application to support detection until the patch is applied.

bash

# Example: restrict access to the T-MAC Plus interface using iptables
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP