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There is no single CISA publication called “CISA Vulnerability Review.” What CISA provides is a set of connected pieces: the Known Exploited Vulnerabilities (KEV) Catalog, the remediation requirements in Binding Operational Directive (BOD) 22-01, and operational guidance on scanning, prioritization, and remediation. Used together, they give an organization a defensible way to decide which vulnerabilities to fix first, how fast, and what to do when a patch cannot go in right away. This article explains how those pieces work, where their authority stops, and how to read the figures CISA has published.
What “CISA vulnerability review” refers to
People searching this phrase usually want to know how CISA’s vulnerability guidance should feed into their own review of systems and software. The official material covered here does not name a specific review report, methodology, or review period. Treat it as an explainer of the framework, not a summary of one dated document.
The KEV Catalog is a prioritization input, not a complete risk list
CISA describes the KEV Catalog as an authoritative source of vulnerabilities that are being exploited in the wild. CISA’s KEV page puts the expected use plainly:
“Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework.” (Cybersecurity and Infrastructure Security Agency, Known Exploited Vulnerabilities Catalog page)
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The catalog is a living list. Entries are added and can change, so the number of entries and the specific CVEs listed should be checked on CISA’s live catalog on the day you use them, not copied from an article or search snippet.
A practical consequence: KEV membership is strong evidence that exploitation has been observed, but absence from the catalog does not mean a flaw is harmless. A vulnerability that is not listed has simply not been recorded as exploited. Severity, asset exposure, and business impact still need to be weighed.
Who BOD 22-01 binds, and who should still follow its pattern
BOD 22-01 is the directive that makes KEV remediation mandatory for Federal Civilian Executive Branch (FCEB) agencies. Those agencies must remediate listed vulnerabilities by the due dates the directive specifies.
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Review workflow
A review that works has five stages. Each one feeds the next, and skipping one tends to produce a list of findings that nobody can act on.
1. Establish asset discovery and scan coverage
Start by confirming what you actually have. Compare your asset inventory against what your scanners can reach. Segments that are not scanned, cloud workloads that were never onboarded, and devices that appear only occasionally are common gaps. A clean scan report over an incomplete inventory is not a clean environment.
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2. Analyze the scan results
Scanning produces findings, not a finished review. Group them by product and version, then by host. Duplicate findings across hosts and tools are normal, and they should be merged before anyone assigns work.
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For each finding, confirm the affected software and version are really present on the asset, and check whether a fix or mitigation has already been applied. Scanner output can be stale or can flag a version string that a vendor has backported. Validation turns a list of alerts into a list of confirmed exposures.
4. Prioritize using KEV status and organizational context
Place KEV-listed issues at the top of the queue, then adjust for exposure and importance. An exploited flaw on an internet-facing system that holds sensitive data outranks the same flaw on an isolated test host. The comparison table below lists the axes to weigh.
5. Test, remediate, record, and mitigate
Test patches where your process calls for it, then apply them. Record the status of every item that remains open, with an owner and a review date. If a patch cannot be applied promptly, apply a temporary control and keep the item open until the real fix lands.
Prioritization axes compared
| Axis | Question it answers | Typical evidence |
|---|---|---|
| Exploitation status | Has exploitation been observed? | Listing in the KEV Catalog |
| Asset exposure | Is the affected product present and reachable? | Asset inventory and validated scan results |
| Asset importance | What is lost or exposed if this system is compromised? | Your internal criticality rating |
| Remediation due date | How quickly must it be fixed? | For FCEB agencies, the due date in BOD 22-01; for other organizations, not set by this guidance, so use your own policy |
| Patch availability and test status | Is a fix available, and has it been tested? | Vendor advisory and internal test records |
| Need for temporary mitigation | What reduces risk if patching must wait? | A documented compensating-control decision |
When a patch cannot be applied right away
Patching is the usual remediation in CISA’s response guidance. Depending on the circumstances, limiting access, isolating an affected asset, or making configuration changes can also reduce risk. When a patch cannot be applied promptly, temporary measures may include:
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- Disabling the vulnerable service or feature, if the business function allows it.
- Adding firewall restrictions to limit which hosts can reach the affected component.
- Increasing monitoring on the asset so that exploitation attempts are noticed.
- Isolating the asset from sensitive network segments until it is patched.
Every temporary measure should be recorded with its reason and an expiry point. A mitigation that quietly becomes permanent is a common way for a KEV item to remain open for years.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Reading CISA’s published figures
Two numbers are often quoted alongside KEV discussions. Both are point-in-time records, not current totals.
| Figure | As of or published | Source and scope | How to use it |
|---|---|---|---|
| 1,199 KEV entries | Counted as of August 31, 2024; reported January 2025 | CISA’s CPG Adoption Report | Historical reference for catalog growth; not the current count |
| Three vulnerabilities added | CISA alert dated August 12, 2025 | CISA alert citing evidence of active exploitation | Example of how additions are announced; check the live catalog for current status of those CVEs |
Neither figure tells you whether a specific product is in the catalog today. For that, you need the live catalog and your own validated inventory.
Limits to keep in mind
- No single CISA “vulnerability review” report or review period was identified in the official guidance covered here.
- BOD 22-01 due dates apply to FCEB agencies. Other organizations should set their own timelines.
- CISA’s FY 2025 assessment guide is written for federal assessments and references federal directives. Its workflow stages are useful for any organization, but its deadlines and reporting expectations are not.
- The guidance supports workflow comparisons and prioritization axes. It does not evaluate named commercial scanning or patch-management products.
Across all of this, the reliable core is simple: use the KEV Catalog to decide what is being exploited, validate your findings against real assets, and document every item that stays open.
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