Vulnerability Description
Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.
CVSS Score
6.7
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1607 | < 10.0.14393.9140 |
| Microsoft | Windows 10 1809 | < 10.0.17763.8755 |
| Microsoft | Windows 10 21H2 | < 10.0.19044.7291 |
| Microsoft | Windows 10 22H2 | < 10.0.19045.7291 |
| Microsoft | Windows 11 23H2 | < 10.0.22631.7079 |
| Microsoft | Windows 11 24H2 | < 10.0.26100.8390 |
| Microsoft | Windows 11 25H2 | < 10.0.26200.8457 |
| Microsoft | Windows 11 26H1 | < 10.0.28000.2113 |
| Microsoft | Windows Server 2012 | - |
| Microsoft | Windows Server 2016 | < 10.0.14393.9140 |
| Microsoft | Windows Server 2019 | < 10.0.17763.8755 |
| Microsoft | Windows Server 2022 | < 10.0.20348.5139 |
| Microsoft | Windows Server 2022 23H2 | < 10.0.25398.2330 |
| Microsoft | Windows Server 2025 | < 10.0.26100.32860 |
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-21530?
CVE-2026-21530 is a vulnerability with a CVSS score of 6.7 (MEDIUM). Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-21530?
CVE-2026-21530 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-21530?
Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21H2, Microsoft Windows 10 22H2, Microsoft Windows 11 23H2.