# Microsoft Edge WebView2 Runtime 143.0.3650.66

Microsoft Edge WebView2 Runtime 143.0.3650.66, released December 4, 2025, fixes 14 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: High. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/microsoft.edgewebview2runtime-143.0.3650.66
- Platform: Windows apps
- Released: Dec 4, 2025
- Priority: High (Closes CVE-2025-13633, high severity)
- CVEs: 14, exploited: 0, on CISA KEV: 0
- Superseded by: [Microsoft Edge WebView2 Runtime 157.0.4341.42](https://patchblox.com/security/data/product/windows-app/microsoft-edge-webview2-runtime.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Edge WebView2 Runtime](https://patchblox.com/security/data/product/windows-app/microsoft-edge-webview2-runtime.md) |  | 143.0.3650.66 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-13633](https://patchblox.com/security/data/cve/CVE-2025-13633.md) | High | Chromium: CVE-2025-13633 Use after free in Digital Credentials | 8.8 | 0.0050 |  |
| [CVE-2025-13630](https://patchblox.com/security/data/cve/CVE-2025-13630.md) | High | Chromium: CVE-2025-13630 Type Confusion in V8 | 8.8 | 0.0046 |  |
| [CVE-2025-13631](https://patchblox.com/security/data/cve/CVE-2025-13631.md) | High | Chromium: CVE-2025-13631 Inappropriate implementation in Google Updater | 8.8 | 0.0042 |  |
| [CVE-2025-13720](https://patchblox.com/security/data/cve/CVE-2025-13720.md) | High | Chromium: CVE-2025-13720 Bad cast in Loader | 8.8 | 0.0033 |  |
| [CVE-2025-13638](https://patchblox.com/security/data/cve/CVE-2025-13638.md) | High | Chromium: CVE-2025-13638 Use after free in Media Stream | 8.8 | 0.0032 |  |
| [CVE-2025-13639](https://patchblox.com/security/data/cve/CVE-2025-13639.md) | High | Chromium: CVE-2025-13639 Inappropriate implementation in WebRTC | 8.1 | 0.0031 |  |
| [CVE-2025-13721](https://patchblox.com/security/data/cve/CVE-2025-13721.md) | High | Chromium: CVE-2025-13721 Race in v8 | 7.5 | 0.0026 |  |
| [CVE-2025-62223](https://patchblox.com/security/data/cve/CVE-2025-62223.md) | Routine | Microsoft Edge (Chromium-based) for Mac Spoofing Vulnerability | 4.3 | 0.0047 |  |
| [CVE-2025-13637](https://patchblox.com/security/data/cve/CVE-2025-13637.md) | Routine | Chromium: CVE-2025-13637 Inappropriate implementation in Downloads | 4.3 | 0.0025 |  |
| [CVE-2025-13632](https://patchblox.com/security/data/cve/CVE-2025-13632.md) | Routine | Chromium: CVE-2025-13632 Inappropriate implementation in DevTools | 5.4 | 0.0024 |  |
| [CVE-2025-13636](https://patchblox.com/security/data/cve/CVE-2025-13636.md) | Routine | Chromium: CVE-2025-13636 Inappropriate implementation in Split View | 4.3 | 0.0024 |  |
| [CVE-2025-13635](https://patchblox.com/security/data/cve/CVE-2025-13635.md) | Routine | Chromium: CVE-2025-13635 Inappropriate implementation in Downloads | 4.4 | 0.0018 |  |
| [CVE-2025-13640](https://patchblox.com/security/data/cve/CVE-2025-13640.md) | Routine | Chromium: CVE-2025-13640 Inappropriate implementation in Passwords | 3.5 | 0.0018 |  |
| [CVE-2025-13634](https://patchblox.com/security/data/cve/CVE-2025-13634.md) | Routine | Chromium: CVE-2025-13634 Inappropriate implementation in Downloads | 4.4 | 0.0017 |  |

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Data as of 2026-11-11T13:47:35Z 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

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