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CVE-2025-21298

CriticalPublished

Windows OLE Remote Code Execution Vulnerability

Published: Jan 14, 2025
Updated: Jun 9, 2026
Assigning CNA: microsoft
Evidence observed: Aug 8, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

80.9%

High · next 30 days

Percentile: 99.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Windows OLE Remote Code Execution Vulnerability

Sources

CVE-2025-21298PoC
A Critical Windows OLE Zero-Click Vulnerability. This is a proof-of-concept for CVE-2025-21298 - Windows OLE Remote Code Execution Vulnerability (CVSS 9.8). This is a memory corruption PoC
CVE-2025-21298PoC
Proof of concept & details for CVE-2025-21298
full-poc-CVE-2025_21298PoC
Complete analysis of CVE-2025-21298, a double free vulnerability related to ole32 library in windows.
vulnerability-poc

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PoC

CVE proof-of-concept labs, exploit scripts, and detection/prevention rules (Nginx, Apache, Snort, YARA) for high-severity CVEs. Authorized security testing & research only.