CVE-2026-7697: AMTT Hotel Broadband System SQLi Flaw

CVE-2026-7697 Overview

CVE-2026-7697 is a SQL injection vulnerability in AMTT Hotel Broadband Operation System 1.0. The flaw resides in the /manager/card/cardhand_submit.php script, where the ID parameter is passed to a database query without proper sanitization. Attackers can manipulate this argument to inject arbitrary SQL statements over the network.

The issue is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The exploit has been publicly disclosed, and the vendor did not respond to disclosure attempts. Authenticated access at a high privilege level is required to reach the vulnerable endpoint.

Critical Impact
Authenticated remote attackers can inject SQL statements through the ID parameter of cardhand_submit.php, potentially exposing or modifying backend database records used by the hotel broadband management interface.

Affected Products

AMTT Hotel Broadband Operation System 1.0
Component: /manager/card/cardhand_submit.php
Vulnerable parameter: ID

Discovery Timeline

2026-05-03 - CVE-2026-7697 published to NVD
2026-05-05 - Last updated in NVD database

Technical Details for CVE-2026-7697

Vulnerability Analysis

The vulnerability exists in the manager-side card handling script cardhand_submit.php. The application accepts the ID argument from the request and concatenates it into a SQL query without parameterization or escaping. An attacker who supplies crafted SQL syntax through ID causes the database engine to execute attacker-controlled statements.

Because the attack is reachable over the network, an authenticated user with high privileges in the manager interface can exploit it remotely. The public disclosure of the technique increases the likelihood of opportunistic abuse against exposed deployments. The EPSS score of 0.026% reflects current low-volume exploitation activity, but published proof-of-concept material lowers the barrier for adversaries.

Root Cause

The root cause is the absence of input validation and prepared statements when handling the ID parameter inside /manager/card/cardhand_submit.php. User-supplied data is interpolated directly into a SQL string, which violates secure query construction practices outlined in [CWE-74].

Attack Vector

Exploitation requires network access to the manager interface and valid high-privilege credentials. The attacker submits an HTTP request to cardhand_submit.php with a malicious payload in the ID field. The injected SQL executes within the application's database context, enabling read or write operations on hotel broadband management records.

No verified exploitation code is published in a controlled repository. Refer to the GitHub Issue Tracker Entry and the VulDB Vulnerability #360866 record for technical context.

Detection Methods for CVE-2026-7697

Indicators of Compromise

HTTP requests to /manager/card/cardhand_submit.php containing SQL meta-characters such as single quotes, UNION, SELECT, --, or ; inside the ID parameter.
Web server access logs showing unusually long or encoded ID values from a single source.
Database error responses or 500-status replies originating from the cardhand_submit.php endpoint.

Detection Strategies

Deploy web application firewall rules that flag SQL syntax in the ID query parameter for the AMTT manager path.
Inspect database query logs for queries against card-related tables containing tautologies such as OR 1=1 or stacked statements.
Correlate authenticated manager sessions with anomalous query volume or error rates against the hotel broadband database.

Monitoring Recommendations

Forward web server, application, and database logs to a centralized analytics platform for cross-source correlation.
Alert on repeated 4xx or 5xx responses from cardhand_submit.php paired with manager-role authentication events.
Track new or unexpected database accounts, schema changes, or bulk row exports following manager logins.

How to Mitigate CVE-2026-7697

Immediate Actions Required

Restrict network exposure of the AMTT manager interface to trusted administrative networks or VPN segments only.
Rotate credentials for high-privilege manager accounts and enforce strong, unique passwords.
Audit recent activity on cardhand_submit.php for evidence of injection attempts before applying compensating controls.

Patch Information

No vendor patch is available. The vendor was contacted but did not respond to the disclosure, according to the VulDB Vulnerability #360866 record. Operators should assume the issue remains unfixed in AMTT Hotel Broadband Operation System 1.0 and apply compensating controls.

Workarounds

Place the manager interface behind a web application firewall configured to block SQL injection patterns on the ID parameter.
Apply strict allow-listing on the reverse proxy so only numeric values reach cardhand_submit.php.
Limit database account privileges used by the application so injection cannot reach administrative SQL functions.
Consider isolating or decommissioning vulnerable instances if the vendor remains unresponsive.

bash

# Example NGINX rule restricting ID to numeric values before reaching the app
location = /manager/card/cardhand_submit.php {
    if ($arg_ID !~ "^[0-9]+$") { return 400; }
    proxy_pass http://amtt_backend;
}