Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-32189
HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-14. the CNA's CVSS baseline 7.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(medium)
- EPSS
- 29.4%
- KEV
- Not listed
Published
April 14, 2026
Last Modified
June 19, 2026
Advisory Details (1)
Auto-updated Apr 29, 2026Patch available. Sources: microsoft.
microsoft Patch Available
Security Update Guide - Microsoft Security Response Center
Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32189Vendor Advisories for CVE-2026-32189(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Frequently asked(5)
What is CVE-2026-32189?
CVE-2026-32189 is a high vulnerability published on April 14, 2026. Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
When was CVE-2026-32189 disclosed?
CVE-2026-32189 was first published in the National Vulnerability Database on April 14, 2026, with the most recent update on June 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-32189 actively exploited?
CVE-2026-32189 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-32189?
CVE-2026-32189 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-32189?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-32189, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-32189
Is Your Infrastructure Affected by CVE-2026-32189?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.