External risk intelligence

Next4Biz CSM Untrusted Data Deserialization Allows Code Injection

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-7861

Customer Service Management (CSM) systems are typically deployed as internet-facing web applications to enable external customer interactions, ticketing, and support portal access, making them commonly reachable from the public internet.

Deserialization

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 vulnerability has been identified in Next4Biz Information Technologies Inc. Customer Service Management (CSM) software. This flaw, related to how the system processes untrusted data, could allow attackers to inject and execute malicious code. The primary concern is to determine if your organization utilizes this specific software and, if so, to what extent it may be exposed.

Untrusted data processing allows code injection.
Confirms exposure for Customer Service Management.
Assess relevance to our specific deployments.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted data over the network to the Customer Service Management (CSM) system. Because no authentication or user interaction is required, an attacker could remotely trigger the deserialization of untrusted data, leading to code injection.

Exposed to the network.
Deserializing untrusted data.
Allows remote code injection.

Live Threat

Current exploitation, exposure, and threat context

A deserialization vulnerability in Next4Biz CSM could allow an attacker to inject and execute arbitrary code when the application processes untrusted data, potentially impacting the confidentiality, integrity, and availability of the system.

System code execution risk.
Untrusted data processed by the application.
Compromised system and data integrity.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-world ownership likely falls to the platform or application teams responsible for the Next4Biz CSM deployment, with support from network and security teams to assess exposure. The initial practical move is to identify all instances of CSM, confirm their external reachability and business criticality, and then locate the accountable owner for remediation planning.

Platform or application teams own the issue.
Verify CSM instances and their reachability.
Plan remediation based on confirmed risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Next4Biz CSM?

Next4Biz Customer Service Management (CSM) is an enterprise software platform designed to handle customer interactions, support ticketing, and service requests. Organizations use it to create portals where customers and agents communicate, centralizing service workflows and data management within a single application framework.

What does CVE-2026-7861 mean by deserialization?

This vulnerability involves the weakness class CWE-502, Deserialization of Untrusted Data. In plain terms, the software takes data sent by a user and converts it back into complex objects without checking if that data is safe. An attacker can manipulate this data to force the application into executing malicious instructions or code, effectively bypassing typical system security controls.

How is this code injection triggered?

An attacker triggers this flaw by sending specifically crafted network requests to the Next4Biz CSM system. Because the vulnerability lies in how the software processes incoming data streams, the system does not require an attacker to have a valid account or perform any specific actions, such as clicking a link, to succeed.

Is my instance of Next4Biz CSM at risk?

According to Halo Surface Signal, CSM systems are frequently deployed as internet-facing web applications to facilitate external support access, which significantly increases the likelihood of reachability. If your instance is accessible from the public internet, it faces a higher probability of being targeted compared to systems restricted to an internal-only network.

What should I do if I use this software?

First, conduct a comprehensive audit to locate every deployment of Next4Biz CSM within your infrastructure. Once you have identified these instances, determine if they are exposed to the internet. Coordinate with the platform or application team responsible for each deployment to verify the environment and prioritize remediation planning based on the business impact of that specific system.

References

siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1027

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.