External risk intelligence

GNCC GP5 Weak Hashing Algorithm Exposes Root Credentials.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-36182

GNCC GP5 is an IoT device typically deployed as an edge service or network management appliance. Such devices are commonly configured with management interfaces or service endpoints reachable via the internet, making them a likely target for remote network-based access in standard deployment patterns.

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 security vulnerability has been identified in GNCC GP5, a type of technology that manages network devices. The issue involves a weak method for protecting the system's main password, which could potentially allow unauthorized users to gain full control of the system. Understanding the relevance and exposure of this technology within our environment is the primary concern.

Weak password protection allows unauthorized access.
Important for managing network devices.
Confirm relevance and assess potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could potentially gain access to the root password by exploiting a weakness in how GNCC GP5 protects it. This could involve systematically trying different password combinations to guess the correct one, especially if the system uses a weak method for creating the password hash. Once successful, an attacker could then leverage the gained root privileges for further malicious activities.

No authentication is required to begin.
Password hashing weakness is exploited.
Risks include credential compromise and privilege escalation.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to obtain root credentials by using a weak hashing algorithm to protect the root password. This could lead to unauthorized access and control of the affected system.

Root password hashes
Bruteforce attack
Unauthorized system control

Operational Fix

Recommended remediation, mitigation, and detection steps

The discovery of a weak hashing algorithm in GNCC GP5 v7.1.76 necessitates immediate attention from infrastructure and security teams. The first practical step involves identifying all instances of this technology, assessing their network exposure and business criticality, and then pinpointing the accountable system owner to coordinate remediation efforts.

Infrastructure and security teams own the issue.
Verify device exposure and business criticality.
Plan and execute remediation based on 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 GNCC GP5?

GNCC GP5 is an IoT technology designed for network device management. It functions as an edge service or appliance that administrators use to oversee and control connected hardware across a network. Because it acts as a central control point, the security of its internal configuration and access credentials is critical to maintaining overall network integrity.

What does CVE-2026-36182 mean for system security?

This CVE highlights a weakness classified as CWE-328, which involves the use of a weak hashing algorithm. Essentially, the mathematical process used to scramble and store the root password is not robust enough to resist modern computation. Because the protection is insufficient, an attacker could theoretically reverse-engineer or guess the password, potentially gaining full administrative control over the device.

How can an attacker trigger this vulnerability?

An attacker initiates the attack by performing a brute-force effort against the device's password protection mechanism. No prior authentication is needed to start this process. It is important to note that the vulnerability does not stem from a misconfiguration of user settings, but from the inherent design of the hashing algorithm itself. Simply changing a password does not mitigate the risk, as the underlying storage method remains weak.

Is my device at risk based on Halo Surface Signal?

Halo Surface Signal identifies GNCC GP5 as a likely target because these devices are frequently deployed as network appliances with management interfaces exposed to the internet. If your instance is reachable from outside your internal network, it is considered higher risk. You should verify if your specific implementation allows remote network-based access, as this drastically increases the ability for unauthorized actors to attempt the brute-force attack.

Do I need to take action if I run GNCC GP5 v7.1.76?

Yes, you should prioritize this issue. Begin by creating an inventory of all GNCC GP5 instances in your environment to determine which are critical to your operations. Once identified, work with the accountable system owners to evaluate their network placement and connectivity. While planning for a long-term resolution, consider restricting network access to these devices to only trusted internal sources to minimize the attack surface.

References

github.com/BadChemical/IoT-Vulnerability-Research-Public/blob/ma…

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.