External risk intelligence

Use of Default Credentials Vulnerability Affects Multiple Systems

CVE advisorySeverity: CRITICAL (CVSS 10.0)

CVE-2025-55051

The vulnerability involves the use of default credentials. While such flaws often exist in internet-facing appliances or management interfaces, the provided information does not specify the product type or its deployment context. Therefore, while internet reachability is plausible for systems using default credentials, it is not definitively established as common for this specific CVE.

Halo Surface Signal: 3 out of 5 — possibly public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory highlights a critical security vulnerability involving the use of default credentials in certain technologies. Such flaws can allow unauthorized access to systems and data, potentially leading to significant compromise if exploited. The primary concern is to confirm if our organization utilizes the affected technology and assess any exposure.

Uses default, easily guessed passwords.
Critical flaw if systems are internet-facing.
Verify if affected technology is in use.

Attack Path

How an attacker could exploit the issue

An attacker could target systems that have not changed their default login credentials. By leveraging this, an attacker could gain unauthorized access to the affected component, potentially leading to significant compromise of confidentiality, integrity, and availability.

Entry condition: Default credentials are not changed.
Trigger point: Accessing the component with default credentials.
Resulting risk: Complete system compromise and data theft.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to access and modify system data and service behavior remotely, potentially leading to a complete compromise of the affected system when default credentials are used and the system is accessible over a network.

System data and service behavior.
Remote network access.
Complete system compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

The use of default credentials typically falls under the purview of infrastructure or platform teams responsible for managing the underlying systems, with application owners needing to confirm if their specific deployments are impacted. The initial and most critical step is to identify all instances of the affected technology within your environment, assess their network exposure and business criticality, and then assign an owner for remediation planning.

Assign to infrastructure or platform teams.
Verify all affected technology instances.
Plan remediation based on exposure.

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 the software associated with CVE-2025-55051?

This CVE refers to a category of technology—such as network appliances, management interfaces, or embedded systems—that fails to enforce secure password policies. These components are often used to manage infrastructure, hardware, or services, acting as a gateway for administrative control. Because the vulnerability involves inherent configuration defaults rather than a specific software bug, it affects any system that ships with predictable, factory-set credentials that remain unchanged after deployment.

How does CWE-1392 affect security in CVE-2025-55051?

CWE-1392, the Use of Default Credentials, is a weakness where a system relies on factory-preset passwords to gate access. In the context of this CVE, this flaw effectively bypasses authentication entirely because an attacker does not need to crack a password; they only need to know or guess the standard credentials assigned by the manufacturer. This grants them the same level of access as a legitimate administrator, enabling them to control system data and alter service behavior.

Do I need to worry if my system uses non-default passwords?

No. The primary trigger for this vulnerability is the presence of the original, manufacturer-supplied credentials. If your organization has already updated these to unique, complex passwords, the specific exploit path described by this vulnerability is blocked. The risk is specifically tied to configurations where these default values have been left in place, essentially leaving an open door for anyone aware of the default login patterns for that technology.

How do I know if my systems are at risk according to Halo Surface Signal?

Halo Surface Signal notes that while the vulnerability is critical, it is not currently possible to definitively confirm if your specific systems are internet-facing. Because this flaw requires a network connection to reach the management interface, systems exposed directly to the public internet carry a higher risk of discovery and unauthorized access. You should evaluate your internal network topology to determine if these management interfaces are accessible from untrusted zones.

What is the first step to remediate CVE-2025-55051?

Start by identifying every instance of the technology in your environment that might utilize default credentials. Once you have a complete inventory, assess which systems are reachable over the network and prioritize those for immediate password rotation. Coordinate with your infrastructure or platform management teams to ensure that all default account values are replaced with strong, unique credentials across your entire deployment to prevent unauthorized entry.

References

www.gov.il/en/departments/dynamiccollectors/cve_advisories_listi…

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.