Why does "Changed Subdomain Detected" appear in ExposureGrid?

Scanners observe externally visible signals. A finding means our rules matched - validate severity and applicability in your environment.

Could this be a false positive?

Yes, depending on context and coverage limits. Especially for heuristic, partial, or pattern-based checks, corroborate with manual review.

Re-run a scan to confirm the external signal changed, then enable monitoring where your plan supports it.

Changed Subdomain Detected: what it means, why it may matter, and how to remediate with external verification using ExposureGrid.

Changed Subdomain Detected: Asset inventory gaps make it hard to apply consistent security controls across hostnames you own or influence.

Shadow IT and stale DNS often precede misconfiguration or takeover-class issues.

Maintain authoritative inventory, reconcile DNS records, monitor new subdomains, assign owners.

Decommission unused hosts, bring assets under change control, verify third-party ownership.

Run a scan to verify this fix on your domain

Use the same public scanner as the homepage — results honor your plan tier.

ExposureGrid helps discover and track externally visible hostnames over time on supported plans.

Why does "Changed Subdomain Detected" appear in ExposureGrid?: Scanners observe externally visible signals. A finding means our rules matched - validate severity and applicability in your environment.
Could this be a false positive?: Yes, depending on context and coverage limits. Especially for heuristic, partial, or pattern-based checks, corroborate with manual review.
What should I do after changing configuration?: Re-run a scan to confirm the external signal changed, then enable monitoring where your plan supports it.

ExposureGrid continuously monitors these issues and alerts you before they become exploitable.

Run a private scan

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