CVE-2026-84333
Use after free in Dawn in Microsoft Edge vulnerability
MSRC advisory September 11, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-84333
- CWE
- CWE-416
- Affected products
- Microsoft Edge · Microsoft Microsoft Edge · Microsoft
What happened
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see [Google Chrome Releases](https://chromereleases.googleblog.com/2026) for more information.
What it means for your business
Use after free in Dawn in Microsoft Edge vulnerability (CVE-2026-84333) was added to Microsoft’s security update guidance. This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see [Google Chrome Releases](https://chromereleases.googleblog.com/2026) for more information. If you need help checking exposure, call (864) 335-9223.
CVSS score
9.6 (Critical)
EPSS probability
0.28%
Sources
Related briefs
Out of bounds memory access in V8 in Microsoft Edge vulnerability
Out of bounds memory access in V8 in Microsoft Edge vulnerability (CVE-2026-0899) was added to Microsoft’s security update guidance. Information published. If you need help checking exposure, call (864) 335-9223.
Chromium CVE-2026-87559: UI misrepresentation in Microsoft Edge vulnerability
Chromium CVE-2026-87559: UI misrepresentation in Microsoft Edge vulnerability (CVE-2026-87559) was added to Microsoft’s security update guidance. This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see [Google Chrome Releases](https://chromereleases.googleblog.com/2026) for more information. If you need help checking exposure, call (864) 335-9223.
Use after free in WebGL in Microsoft Edge vulnerability
Use after free in WebGL in Microsoft Edge vulnerability (CVE-2026-84352) was added to Microsoft’s security update guidance. This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see [Google Chrome Releases](https://chromereleases.googleblog.com/2026) for more information. If you need help checking exposure, call (864) 335-9223.
UI misrepresentation in FullScreen in Microsoft Edge vulnerability
UI misrepresentation in FullScreen in Microsoft Edge vulnerability (CVE-2026-84330) was added to Microsoft’s security update guidance. This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see [Google Chrome Releases](https://chromereleases.googleblog.com/2026) for more information. If you need help checking exposure, call (864) 335-9223.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.