# CVE-2026-21223: Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

CVE-2026-21223 is fixed in 4 products on 1 platform, first by Microsoft Edge 144.0.3719.82, released January 16, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-21223
- Priority: High
- CVSS: 7.1
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jan 16, 2026
- Weakness: Improper Privilege Management
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21223

## Description

<p>Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Microsoft Edge | 144.0.3719.82 | [Microsoft Edge 144.0.3719.82](https://patchblox.com/security/data/fix/windows-app/microsoft.edge-144.0.3719.82.md) | Jan 16, 2026 |
| Windows apps | Microsoft Edge Beta | 151.0.4129.59 | [Microsoft Edge Beta 151.0.4129.59](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.beta-151.0.4129.59.md) | Jul 31, 2026 |
| Windows apps | Microsoft Edge Dev | 152.0.4167.0 | [Microsoft Edge Dev 152.0.4167.0](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.dev-152.0.4167.0.md) | Jul 20, 2026 |
| Windows apps | Microsoft Edge WebView2 Runtime | 144.0.3719.82 | [Microsoft Edge WebView2 Runtime 144.0.3719.82](https://patchblox.com/security/data/fix/windows-app/microsoft.edgewebview2runtime-144.0.3719.82.md) | Jan 16, 2026 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.