External risk intelligence

Shenzhou Shihan Video Conference SQL Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-51821

The vulnerability exists in a video conference system, which is a type of application typically deployed as an internet-facing service or portal to facilitate remote communication. The specific endpoint, /user/getUserLogin, is a common web-based gateway interface that is often exposed to the public internet in standard deployments.

SQL Injection

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical SQL injection vulnerability has been identified in Shenzhou Shihan Video Conference System. This issue allows attackers to remotely execute arbitrary code by exploiting a weakness in the user login process. The exposure of this vulnerability is classified as external, meaning it could be reached over a network.

Attackers can run their own code.
Potential for system compromise requires confirmation.
Assess relevance and exposure to video conferencing systems.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending specially crafted requests over the internet to the video conference system's login endpoint. By manipulating the 'getUserLogin' function, an attacker can inject malicious SQL commands, potentially leading to unauthorized code execution on the server.

Network access required.
Triggered via login endpoint.
Remote code execution risk.

Live Threat

Current exploitation, exposure, and threat context

A SQL injection vulnerability in the Shenzhou Shihan Video Conference System could allow an attacker to execute arbitrary code. This could impact the confidentiality, integrity, and availability of the system when supported by the advisory's conditions and when the vulnerable endpoint is accessible.

System data and service behavior.
Remote code execution via the user login endpoint.
Compromise of system availability and integrity.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-World Ownership

Given this SQL Injection vulnerability in a video conference system's login endpoint, the platform or application team responsible for the Shenzhou Shihan Video Conference System is the primary owner. They must first confirm the system's deployment scope, identify critical or exposed instances, and locate the accountable business owner before planning remediation.

Platform/Application team owns the issue.
Verify system exposure and criticality.
Plan remediation based on risk assessment.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the Shenzhou Shihan Video Conference System?

It is a software platform designed to host virtual meetings and manage real-time communication. Organizations use these systems to enable remote collaboration, allowing participants to join conferences and manage authentication through specialized web-based gateways.

What does SQL injection mean for CVE-2026-51821?

This vulnerability is classified as CWE-89, which occurs when an application improperly handles user-provided data before including it in a database query. In this case, an attacker can manipulate input to trick the system into executing unauthorized commands, effectively turning a data request into a pathway for running arbitrary code on the server.

How is this vulnerability triggered?

An attacker triggers the flaw by sending a specially crafted network request to the /user/getUserLogin endpoint. It is important to note that this specific vulnerability relies on interacting with this exact login interface; it is not triggered by standard usage or interactions with other parts of the video conferencing system that do not process these login-related inputs.

Why should I care about this CVE if my system is internal?

Halo Surface Signal notes that this software is frequently deployed as an internet-facing portal to ensure remote users can connect to meetings. While an internal-only instance may have a lower immediate risk, you should verify if your specific configuration inadvertently exposes the /user/getUserLogin endpoint to the broader network, as this is the primary path for external exploitation.

What are the first steps for managing this risk?

Begin by identifying all instances of the Shenzhou Shihan software within your environment to determine which are currently active. Once located, confirm whether these systems are reachable over the network and prioritize those exposed to external traffic. Coordinate with your application owners to restrict access to the affected endpoint while awaiting further guidance.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.