CVE-2020-8657 (EyesOfNetwork Use of Hard-Coded Credentials)

What hard-coded credentials mean in a CVE context

A hard-coded credential vulnerability means the product ships with an embedded secret, such as an API key or password, that is reused by design rather than set uniquely for each deployment. That creates a predictable authentication path that attackers can test once and then reuse wherever the same secret exists.

In a web or API-enabled product, the damage is not limited to login bypass. A reused embedded key can expose administrative functions, internal data, configuration endpoints, or privileged integrations, especially when the secret is treated as trusted by default across instances.

Why this flaw is dangerous in EyesOfNetwork

For EyesOfNetwork, the key danger is that the vulnerable secret is the same by default, so the weakness is not just misconfiguration by a single operator. Every exposed or reachable deployment may inherit the same trust failure until the embedded credential is removed or replaced.

This matters because hard-coded credentials are easy to discover through reverse engineering, source review, traffic inspection, or simple reuse across installations. Once discovered, they can turn a monitoring or management platform into a foothold for unauthorized access, persistence, or lateral movement.

When tracking product-specific exposure, readers should rely on the vendor advisory and the CVE Program record structure, and on the NIST National Vulnerability Database for vulnerability metadata and reference data.

How organisations check exposure and reduce attack surface

The first question is whether any EyesOfNetwork instance is in the asset inventory, where it is deployed, and whether it is reachable from the internet or from networks an attacker could reach after initial compromise. Exposure is often determined by placement and access paths as much as by the software flaw itself.

Teams should then compare deployment details with the vendor advisory and confirm whether they have removed the default or embedded key, rotated any related API credentials, and isolated the affected service from broader trust relationships. If the platform is tied into other systems, that linkage can magnify the blast radius of a single reused secret.

Broader credential hygiene also applies. NHIMG’s API Key Management Guide and Secrets Management Guide are useful when the core issue is whether an embedded secret has been scoped, stored, rotated, and revoked safely.

Remediation, detection, and post-exploitation review

Remediation should focus on replacing any hard-coded secret with a unique deployment-specific credential, then revoking the old value everywhere it may have been copied or cached. If a patch cannot be applied immediately, organisations should restrict access to the vulnerable service, block unnecessary inbound paths, and remove any network exposure that is not operationally required.

Detection should look for unexpected use of the embedded API key, unusual administrative actions, new accounts, configuration changes, or access from unfamiliar source addresses. After patching, review logs for signs that the credential was already used before remediation, because fixing the software does not erase prior compromise.

If exploitation is suspected, any downstream secrets, sessions, or privileged tokens that the attacker could have reached through EyesOfNetwork should be reviewed and rotated. The practical question is not only whether the vulnerable key was changed, but whether it enabled broader trust abuse before it was removed.

Risk and Threat Considerations

Hard-coded credentials are especially dangerous because they collapse authentication into a reusable secret that is often discoverable outside normal operational controls. Once that secret is known, an attacker may gain the same trusted access as the legitimate application or operator account that was meant to use it.

Failure mechanism: The embedded API key can be extracted from the product or guessed from known defaults, then reused to authenticate directly or pivot into functions that assume the caller is trusted.

Impact: The result can be unauthorized access, privilege abuse, data exposure, persistence in the management plane, and possible reuse of the same trust relationship across multiple deployments.

Practitioner Guidance

Why practitioners should care: Treat every embedded secret as a lifecycle failure, not just a software bug. If the same credential is present in more than one deployment, one compromise can become many compromises, especially in management or monitoring platforms that sit close to high-value systems.

What to watch for: Prioritise any deployment where the product documentation, vendor advisory, or internal review indicates a default or shared API key. In those cases, the operational question is whether the secret can be replaced cleanly without breaking integrations or leaving stale trust paths behind.

Related resources from NHI Mgmt Group

• What happens when DevOps teams use hard-coded or long-lived credentials instead of just-in-time access?
• CVE-2026-20316 (Cisco Secure Firewall Management Center Use of Hard-coded Password)
• What is the impact of using hard-coded credentials on security?
• What breaks when MCP credentials are hard coded?