API Reference: Patch Tuesday Response Process
MSRC Security Update API
CVRF Vulnerability Fields
| Field |
Description |
CVE |
CVE identifier |
Title.Value |
Vulnerability title |
Threats[].Description.Value |
Severity, exploitation status |
CVSSScoreSets[].BaseScore |
CVSS v3 base score |
ProductStatuses[].ProductID |
Affected product IDs |
Remediations[].URL |
KB article / patch URL |
CISA Known Exploited Vulnerabilities (KEV)
KEV Entry Fields
| Field |
Description |
cveID |
CVE identifier |
vendorProject |
Vendor name |
product |
Product name |
dateAdded |
Date added to KEV |
dueDate |
Remediation due date |
Patch Priority Matrix
| Priority |
Criteria |
SLA |
| Emergency |
Exploited + KEV + CVSS >= 9.0 |
24 hours |
| Critical |
Exploited OR KEV + CVSS >= 7.0 |
72 hours |
| Standard |
CVSS >= 7.0, no exploitation |
7 days |
| Routine |
CVSS < 7.0, no exploitation |
30 days |
NVD API v2
WSUS Deployment API (PowerShell)
Deployment Phase Timeline
| Phase |
Window |
Targets |
| Emergency |
0-24h |
Critical servers, exploited CVEs |
| Pilot |
24-72h |
Test group (5% of fleet) |
| Broad |
3-7d |
All production systems |
| Cleanup |
7-30d |
Exceptions, rollback monitoring |