Vulnerability scanning and remediation SLAs

“Vulnerability scanning and remediation SLAs” sounds simple until an assessor asks two questions: “Show me full boundary coverage,” and “Show me that you consistently met your fix timelines.” In FedRAMP, you are expected to run mandated scanning routines and remediate findings within expected timeframes. ¹

For a Compliance Officer, CCO, or GRC lead, the fastest path to a defensible program is to treat scanning and remediation as a measurable service: clear scope, clear cadence, clear severity definitions, clear due dates, and a controlled exception path. If your teams scan “most things” and patch “when they can,” you will struggle during authorization reviews and continuous monitoring because you cannot prove that exploitable weaknesses were identified and resolved on time across the whole boundary. ²

This page gives requirement-level implementation guidance you can hand to Security Operations, Vulnerability Management, and Engineering. It focuses on what auditors and 3PAOs typically press on: asset coverage, scan frequency evidence, remediation aging, and exception governance. For templates and reporting expectations, align your artifacts to FedRAMP’s published documentation structure. ¹

Regulatory text

Requirement (FEDRAMP-07): “Run mandated scanning routines and remediate findings within expected timeframes.” ¹

Plain-English interpretation

You must:

1. Scan your FedRAMP authorization boundary on a defined schedule using approved methods (credentialed where appropriate, plus web/app testing where relevant).
2. Fix the vulnerabilities you find within pre-defined SLAs based on severity.
3. Prove it with durable evidence: coverage, results, remediation actions, aging metrics, and documented exceptions. ¹

FedRAMP inherits its control intent from NIST security control expectations around continuous monitoring and vulnerability management. If you cannot demonstrate consistent execution and timely remediation, you create exploitable exposure and authorization risk. ²

Who it applies to

Entities

• Cloud Service Providers (CSPs) operating a cloud service offering within a FedRAMP authorization boundary. ²

Operational context (what’s in scope)

Apply the requirement to:

• All in-boundary infrastructure (servers, endpoints, network devices, containers, managed services where you control configuration).
• In-boundary applications (including externally facing components and APIs).
• Supporting security tooling that can introduce risk (identity components, logging pipelines, CI/CD runners if they sit inside the boundary).
• Third parties inside the boundary (managed service providers, outsourced SOC functions, or hosted components). You still own compliance outcomes; contract terms must support scan access and remediation timelines. ²

What you actually need to do (step-by-step)

Step 1: Define the authoritative scope (the “scan universe”)

Deliverables you need before tooling debates:

• A boundary asset inventory with unique identifiers, owner team, environment, and criticality.
• A mapping that shows how each asset is scanned (network scanner, agent-based scanner, container scanner, web scanner).
• A rule for “no inventory entry, no deploy” to stop scope drift.

Practical operator note: auditors don’t accept “our scanner covers everything” unless you can show the asset list and the coverage report line up.

Step 2: Set remediation SLAs that are severity-based and enforceable

Create a vulnerability remediation standard that states:

• Severity tiers (often aligned to scanner severity plus contextual risk).
• The SLA clock start (for example, when detected, when validated, or when ticket opened).
• What qualifies as “remediated” (patched, configuration change applied, vulnerable package removed, compensating control accepted under exception).

Keep it simple: one table your engineering leaders sign off on. Your goal is consistent execution and measurable aging.

Step 3: Establish scan cadence and methods per asset class

Define minimum scan routines for:

• Infrastructure vulnerability scans (credentialed where feasible).
• Web application scanning for public and internal apps in boundary.
• Container image and dependency scanning integrated into CI/CD and runtime registries.
• Configuration and exposure checks relevant to your boundary (ports, weak protocols, insecure configs).

FedRAMP expects “mandated scanning routines.” Your SSP and continuous monitoring narratives should match what you actually run. ¹

Step 4: Build the workflow from detection to closure

A defensible workflow has four distinct states:

1. Detected (scanner finding created, tied to asset and owner).
2. Triaged/validated (false positives rejected with evidence; duplicates merged).
3. Remediation in progress (change ticket, PR, patch rollout plan).
4. Closed (rescanned clean, or exception approved).

Operational requirement: every open vulnerability must have an owner and a due date tied to the SLA.

Step 5: Govern exceptions (risk acceptance) with hard controls

You will miss SLAs sometimes. That is manageable if exceptions are controlled:

• Written justification (why fix is not feasible now).
• Compensating controls (segmentation, WAF rule, feature flag, monitoring).
• Explicit approver (risk owner) and expiry date.
• Revalidation requirement (prove the compensating control exists and works).

This is where many FedRAMP programs fail: exceptions live in email threads and never expire, so “temporary” becomes permanent without risk review.

Step 6: Measure and report (what you show in continuous monitoring and assessments)

Minimum operational metrics you should be able to produce on demand:

• Coverage: percent of in-scope assets scanned by each scanner type (infrastructure, web, container) with gaps listed.
• Aging: open findings by severity bucket and age ranges.
• SLA attainment: on-time closure vs late, plus top recurring root causes.
• Exceptions: count, severity distribution, expirations due soon, and compensating control status.

FedRAMP reporting expectations are easiest to meet if you align outputs to their documentation templates and continuous monitoring artifacts. ¹

Step 7: Make it audit-ready (tie it back to your SSP and control narratives)

Ensure your documentation matches reality:

• SSP describes scanning tools, cadence, and roles.
• Procedures explain triage, remediation, verification, and exceptions.
• Evidence shows the last cycles were executed as written.

NIST-aligned programs break when the written procedure is aspirational and the evidence shows ad hoc operation. ²

Required evidence and artifacts to retain

Keep artifacts in a system that supports retention, export, and consistent naming. Examples:

• Vulnerability Management Policy/Standard with severity definitions and remediation SLAs.
• Scanning procedures by asset class (infra, web, container) and credential management process.
• Asset inventory for the FedRAMP boundary and ownership mapping. ²
• Scan schedules and job configurations (tool configuration exports are stronger than screenshots).
• Scan results exports (raw findings plus normalized reporting).
• Ticketing records that show: detection date, owner, due date, fix action, closure evidence.
• Rescan/verification evidence (clean scan output, package version evidence, or control validation).
• Exception register with approvals, compensating controls, and expiry dates.
• Management reporting showing coverage, aging, SLA performance, and recurring issues. ¹

Tooling note: Daydream is useful here because it helps you standardize evidence collection across scanners and ticketing systems, and it makes “coverage + aging + exceptions” reporting repeatable instead of a monthly spreadsheet scramble. ¹

Common exam/audit questions and hangups

Expect these, and pre-build the answers:

• “Show me complete boundary coverage. What assets are not scanned and why?”
• “Are scans credentialed where required, and who controls those credentials?”
• “How do you ensure new assets are scanned immediately after deployment?”
• “Show SLA compliance for the last reporting period. How many were late, and what did you do about it?”
• “How do you validate remediation, beyond marking a ticket ‘done’?”
• “How are exceptions approved, and how do you ensure they expire?”
• “Do third parties inside your boundary permit scanning and timely remediation via contract terms?” ²

Frequent implementation mistakes and how to avoid them

Mistake	Why it fails in FedRAMP	Fix
Scanning without an authoritative asset inventory	You can’t prove coverage	Reconcile scanner target lists to the boundary inventory monthly; track deltas
“Fix when possible” instead of SLAs	No measurable expected timeframes	Publish severity-based SLAs and enforce due dates in ticketing
Closing findings without verification	Evidence gap	Require rescan or version/config proof as closure criteria
Exceptions handled in email/Slack	No governance or expiry	Maintain an exception register with approvals and expirations
Third-party components ignored	You still own boundary risk	Add scanning and remediation SLA clauses to third-party agreements
Metrics exist but aren’t reviewed	Problems persist	Add a monthly vuln review with Security + Engineering leadership

Enforcement context and risk implications

No public enforcement cases were provided in the source catalog for this requirement. Practically, the risk manifests as:

• Authorization friction: assessors may write findings when you cannot demonstrate consistent scanning, timely remediation, or controlled exceptions. ¹
• Continuous monitoring issues: incomplete or inconsistent evidence increases the chance of follow-up questions and corrective action plans.
• Security exposure: unscanned assets and overdue vulnerabilities are common paths to compromise, particularly for internet-facing services. ²

Practical 30/60/90-day execution plan

First 30 days (stabilize scope and SLAs)

• Confirm the authorization boundary inventory is current and has owners.
• Document severity definitions and remediation SLAs; get Security and Engineering sign-off.
• Identify current scanners and coverage gaps by asset class.
• Stand up an exception register with approval workflow and expiry requirement.
• Produce your first “coverage + aging + exceptions” report, even if imperfect. ¹

Days 31–60 (make it operational and measurable)

• Integrate findings into ticketing with automatic assignment, due dates, and status mapping.
• Require verification evidence for closure (rescan or proof-of-fix).
• Establish a recurring vulnerability triage meeting with clear decision rights.
• Tune scanning routines: credentialed scans, authenticated web scans where feasible, and CI/CD scanning gates for new builds.
• Start trend reporting and root-cause tracking (recurring libraries, misconfig patterns). ²

Days 61–90 (harden governance and audit-readiness)

• Reconcile inventory to scanner coverage and document exclusions with compensating controls.
• Test the exception process end-to-end: create, approve, implement compensating control, and schedule expiration review.
• Align SSP language and continuous monitoring artifacts to actual operations.
• Run an internal mock assessment: pick samples across asset types and prove detection-to-closure evidence in minutes, not days. ¹

Frequently Asked Questions

Do SLAs have to match a specific FedRAMP table of days?

The requirement states remediation must occur within “expected timeframes,” and your program must define and consistently meet those timeframes. Set severity-based SLAs, document them, and prove performance with aging and closure evidence. ¹

What counts as “remediation” for a vulnerability?

Remediation should mean the risk is removed or reduced and you can prove it. In practice, that is usually a patch/config change plus verification (rescan clean or objective version/config evidence). ²

How do we handle false positives without failing an audit?

Keep the scanner output, document the validation steps, and record the technical rationale for dismissal tied to the specific asset and version. Auditors accept false positives when your triage process is consistent and evidence-backed. ¹

Can we meet the requirement if some systems can’t be credential-scanned?

Possibly, but you need documented justification and an alternate method that provides comparable assurance. Track those assets explicitly as coverage exceptions, apply compensating controls, and set a plan to eliminate the gap. ²

How should we manage vulnerability remediation when a third party operates part of the boundary?

Put scanning access, notification timelines, and remediation SLAs in the contract or operating agreement, then collect evidence (tickets, reports, attestations) that shows they met the timelines. You still need boundary-level reporting for assessors. ²

What evidence is strongest for continuous monitoring submissions?

Exportable reports that show scan dates, targets, findings, remediation dates, and exception approvals are stronger than screenshots. Align outputs to FedRAMP documentation expectations so the evidence package is consistent month over month. ¹

Footnotes

1. FedRAMP documents and templates

2. NIST SP 800-53 Rev. 5