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Turn vulnerability information into supported applicability decisions, treatment priorities and accountable follow-through around operational constraints.
Managed OT Vulnerability Management is recurring work to review potentially relevant vulnerabilities, determine applicability within an agreed environment, prioritize treatment and track evidence of follow-through. Zeroday connects vulnerability information to operational context, accountable owners and reviewable decisions. Coverage, data sources, cadence and responsibilities are agreed per client.
It fits industrial organizations with an accumulating backlog, incomplete product or version information, or unclear handoffs among security, IT, controls engineering and equipment providers. A vulnerability list is an input. The service makes the applicability, treatment and acceptance decisions behind that list visible.
Review agreed advisory and finding sources against available product, version and system information. Record source dates, confidence, scope limits and what remains uncertain.
Discuss exposure, operational consequence, existing controls and change constraints with technical owners. Assign the treatment decision, implementation responsibility and dependencies.
Review submitted implementation or exception evidence. Distinguish scheduled, implemented, verified and unresolved items. Revisit decisions at the agreed review points or change triggers.
Onboarding identifies sites, included systems, asset classes, data sources and exclusions. Incomplete inventories and unsupported mappings remain visible. Additional discovery, scanning, testing and live changes require explicit scope, an appropriate method and site authorization.
A published severity rating does not describe every consequence or constraint at your site. FIRST's CVSS guidance explains that the Base score measures severity and should not stand alone as a risk assessment. CISA's KEV catalog identifies vulnerabilities known to have been exploited and is an input to prioritization.
EPSS estimates the likelihood of observed exploitation activity over the next 30 days; it is not your site's probability of compromise. Review these signals alongside affected versions, access conditions, process consequence, existing controls and the owner's ability to implement an approved treatment.
This operating context matters because OT has performance, reliability and safety requirements, as described in NIST SP 800-82 Rev. 3. A score can inform a decision; it does not authorize a production change.
The following is fictional. It uses no actual CVE, customer asset or measured result.
Process: an included operator workstation supports an agreed processing area.
Source: a hypothetical supplier advisory names an affected software version range.
Version confidence: the inventory lists a product family; the installed version is unconfirmed.
Exposure: the access conditions needed for applicability have not been established.
Operational consequence: the controls owner must explain the workstation's role and constraints.
Action and owner: the technical owner obtains approved version and configuration evidence with the provider.
Target review: an agreed review point is recorded; no patch window is implied.
Status: applicability under review. Treatment and verification criteria remain undecided.
If later evidence supports applicability, the record explains the chosen priority, authorized treatment, implementation owner and evidence needed for review. If evidence rules it out, retain the reasoning and its limits. A changed inventory can change the coverage denominator; a lower finding count alone does not prove improvement.
An agreed coverage and data-source record, including known blind spots.
A dated queue of reviewed items and supporting advisory evidence.
Applicability and priority decisions with uncertainty and operational context recorded.
Assigned treatment actions, dependencies and implementation responsibilities.
Verification records or documented exceptions with decision owners and review points.
A recurring review of changes, blocked decisions and agreed next actions.
Zeroday leads the agreed review and coordination. Site authorities approve treatment and operational changes; authorized teams and providers perform implementation. The scope states the evidence Zeroday will review and any separately agreed verification activity.
Patch implementation is not assumed. The agreement identifies review, coordination, implementation and verification responsibilities. Equipment-specific work and live-system changes stay with authorized owners and providers under the site's change process.
First review the coverage, quality and usability of your existing data. The proposed scope identifies necessary inputs, integrations and any additional collection. No particular platform or universal compatibility is promised before that review.
Record the constraint, responsible authority and proposed treatment or exception. Review alternatives with the appropriate technical owners and preserve residual uncertainty and a review point. An exception does not establish that the vulnerability has disappeared.
Andres Torres leads the executive relationship and program direction. Technical responsibilities, review cadence, coverage hours and escalation arrangements are agreed in the scope. Continuous monitoring, SOC operations and emergency response are not implied.
Share the broad environment, available inventory or findings, current owners and the recurring problem. Keep detailed configurations and confidential records out of the public inquiry form.
An OT Security Assessment can establish the starting evidence when needed. Existing evidence may support direct onboarding. This capability can form part of a separately agreed ongoing OT service.
Discuss OT Vulnerability Management
OT cybersecurity for manufacturing, industrial facilities and mining.
1755 E Plumb Lane, Suite 150
Reno, Nevada 89502
775-737-0329
Ongoing OT Services · Managed OT Vulnerability Management · OT Security Assessment · OT Finding-to-Closure Support · Critical Process Recovery Readiness
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