Microsoft — Security Activity Report

Windows + Azure + Office (MSRC advisories)

Generated Sep 19, 2026Cohort: 9 vendors with ≥10 CVE advisoriesMethodology ↗

CVE Disclosure Volume

Total all-time: 26,838 CVEs with Microsoft advisories. Source: NVD CVE records joined with vendor advisory publish dates.

2,25420222,10220233,41220243,76020259,3642026

Severity Composition

↑ +4.4 pp

57.5% of Microsoft's 26,838 CVEs are CRITICAL or HIGH severity. Industry median: 53.1%. Source: NVD CVSS v3.1.

CRITICAL 1,470 (5.5%)HIGH 13,964 (52.0%)MEDIUM 10,052 (37.5%)LOW 571 (2.1%)NONE 638 (2.4%)

CISA KEV Listings

at industry median

139 of 17,005 Microsoft CVEs in the last 3 years are on CISA's Known Exploited Vulnerabilities catalog (0.8%). Industry median: 0.8%.

Source: CISA Known Exploited Vulnerabilities catalog (current snapshot). KEV listing means CISA observed active in-the-wild exploitation.

Vendor Patch Velocity

↓ -4.5 days

Median time from CVE disclosure to Microsoft advisory: 4 days (p25 2 days – p75 34 days). Industry median: 9 days.

Sample size: 11,321 CVE→advisory pairs over the last 3 years. Source: vendor advisory published_at minus CVE published.

Top Recurring Weakness Classes

Most-frequently mapped CWEs across Microsoft's last 3 years of CVE disclosures. Source: NVD — CWE mapping per MITRE taxonomy.

  • CWE-416Use After Free2,444 CVEs
  • CWE-122Heap-based Buffer Overflow1,275 CVEs
  • CWE-125Out-of-bounds Read1,131 CVEs
  • CWE-476NULL Pointer Dereference940 CVEs
  • CWE-20Improper Input Validation699 CVEs

Recent Security Advisories

Latest advisories published by Microsoft, straight from the vendor's own feed. Severity labels are the vendor's — scales differ across vendors.

Full advisory archive: /pulse/vendor-advisories →

Data sources & corrections

  • NVD National Vulnerability Database (nvd.nist.gov) — CVE records + CVSS v3.1 severity
  • MITRE cvelistV5 (github.com/CVEProject/cvelistV5) — CNA-published CVE timestamps
  • CISA Known Exploited Vulnerabilities catalog (cisa.gov/known-exploited-vulnerabilities-catalog)
  • Vendor security advisories (RHSA, USN, MSRC, GHSA, etc.) — published_at timestamps
  • MITRE CWE taxonomy (cwe.mitre.org) — weakness class mappings

Snapshot generated Sep 19, 2026. Industry medians refresh every 6 hours; raw vendor counts are queried live on each request.

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