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Zero-days do not wait.
Neither do we.
When a critical vulnerability is being actively exploited, DEFION validates your exposure and delivers mitigations within hours, not days.
What is Imminent Threat Exposure?
Sometimes a threat cannot wait for your regular patch cycle. Imminent Threat Exposure is the rapid response to acute threats: a new zero-day, an active exploit campaign or a critical vulnerability that directly affects your environment. When an acute threat is identified, the team immediately validates whether your environment is exposed, applies compensating measures and monitors for active exploitation. The goal: minimise the time between a threat being published and your protection against it.
From threat disclosure to protection, in hours
When an acute threat is identified, the team immediately checks whether your environment is vulnerable. Not based on theoretical CVSS scores, but through actual validation: are you running the vulnerable version, is the system reachable, are compensating measures already active?
After validation, immediate action follows: patch advice, compensating measures, detection rules and monitoring for exploitation indicators. Every action is documented and tracked until the vulnerability is fully remediated.
The service is not a stand-alone product but an integral part of DEFION's MDR offering. Threat intelligence identifies the acute threat, vulnerability management validates exposure, and detection monitoring watches for active exploitation in your environment simultaneously.
The window between disclosure and exploitation
The time between a vulnerability being published and attackers actively exploiting it is shrinking. What used to be weeks is now hours.
- High-profile vulnerabilities like Log4Shell, ProxyLogon and MOVEit were exploited at scale within 24 hours of public disclosure. A monthly patch cycle cannot protect you from this.
- Without exposure validation, you do not know whether a published vulnerability actually affects your specific configuration. You may be spending effort patching systems that were never vulnerable while missing the ones that were.
- Not all vulnerabilities can be patched immediately. Without compensating measures and active monitoring, the window of exposure extends indefinitely until a maintenance window opens.
What is covered
How DEFION responds to imminent threats
Threat identification
Detection of an acute threat via threat intelligence, vendor advisories or external notification. Relevance filter applied immediately.
Exposure validation
Immediate check whether your environment is running the vulnerable version and whether the affected system is reachable.
Risk assessment
Assessment of exploitability and potential impact in the context of your specific environment and business processes.
Mitigation
Implementation of compensating measures and detection rules while patching is being coordinated.
Patch coordination
Advice and support for patching with prioritisation based on actual exposure and risk.
Monitoring
Active monitoring for exploitation attempts during the acute phase until full remediation is confirmed.
Deliverables
- Acute threat notification with relevance assessment for your environment
- Exposure assessment result with evidence
- Mitigation advice and compensating measures
- Detection rules for exploitation indicators
- Active monitoring during the acute phase
- Post-incident evaluation after full remediation
Which organisations benefit from this service?
Imminent Threat Exposure is relevant for any organisation with a significant external attack surface or systems that cannot be patched immediately.
- All organisations using DEFION MDR services
- Organisations with a large external attack surface
- Companies dependent on critical systems that cannot be quickly patched
- Organisations in regulated sectors where rapid response is mandatory
- IT teams without the capacity to validate exposure for every published vulnerability
Imminent Threat Exposure is included as a standard component of DEFION's MDR services. It can also be provided as a stand-alone service for organisations that need acute threat response capabilities beyond their current programme.
Vendor-agnostic by design
DEFION works with the tooling you already have, or brings ours. No vendor lock-in.
FAQ
How quickly are we notified?
Does this apply to every published CVE?
What if we cannot patch immediately?
How does this relate to Continuous Vulnerability Management?
Do you monitor for active exploitation in our environment?
Ready to respond to acute threats
in hours, not days?
Tell us about your environment. We validate exposure and apply mitigations before attackers can act on the disclosure.