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GuideCVE custody

Cyber insurance patch evidence: what the record must prove

Verified 24 August 2026

Reviewed by Elon Salfati, Founder

The direct answer

Cyber insurance patch evidence is proof, not a policy statement: which critical vulnerabilities were open, when each one closed, what changed, whether the fix was verified, and who signed the record. NIST frames patching as ongoing preventive maintenance. CISA identifies vulnerabilities known to be exploited in the wild.

A policy says what should happen. Evidence says what did.

NIST defines enterprise patch management as identifying, prioritizing, acquiring, installing, and verifying patches and upgrades. A statement that the company patches regularly does not show any of those steps for a specific repository or reporting period.

Map each questionnaire answer to a dated artifact.

The record should connect the finding to the fix and the fix to verification. Use the CISA Known Exploited Vulnerabilities catalog as one prioritization input, not as a replacement for the full vulnerability inventory.

  • Open and closed critical counts for the reporting period.
  • CVE identifier, discovery date, and closure date.
  • Reviewed fix pull request and stated upgrade path.
  • Permanent test or verification result.
  • Exception owner, approval, and expiry when a fix is delayed.

CVE custody produces the record while the work happens.

Salfati Group takes over critical-vulnerability remediation for repositories that pass the free probe. New criticals close inside seven days, every fix is reviewed and tested, and a named engineer signs the month-end evidence pack.

Sources

Primary documentation opened and checked on 24 August 2026.

  1. 1. Guide to Enterprise Patch Management Planning

    NIST

    Patch management as identifying, prioritizing, acquiring, installing, and verifying updates.

  2. 2. Known Exploited Vulnerabilities Catalog

    CISA

    The authoritative catalog of vulnerabilities known to be exploited in the wild.

  3. 3. Pull requests

    GitHub Docs

    Pull requests as reviewable proposals to merge code changes.

Next step

Read-only. The report shows whether custody fits.

Run the free probe →