# Microsoft Edge WebView2 Runtime 136.0.3240.50

Microsoft Edge WebView2 Runtime 136.0.3240.50, released May 1, 2025, fixes 5 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: Urgent. 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-136.0.3240.50
- Platform: Windows apps
- Released: May 1, 2025
- Priority: Urgent (Closes CVE-2025-4052, rated Critical)
- CVEs: 5, 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- Superseded by: [Microsoft Edge WebView2 Runtime 157.0.4341.42](https://patchblox.com/security/data/product/windows-app/microsoft-edge-webview2-runtime.md), the latest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) |  | 136.0.3240.50 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-4052](https://patchblox.com/security/data/cve/CVE-2025-4052.md) | Urgent | Chromium: CVE-2025-4052 Inappropriate implementation in DevTools | 9.8 | 0.0056 |  |
| [CVE-2025-4096](https://patchblox.com/security/data/cve/CVE-2025-4096.md) | High | Chromium: CVE-2025-4096 Heap buffer overflow in HTML | 8.8 | 0.0045 |  |
| [CVE-2025-4050](https://patchblox.com/security/data/cve/CVE-2025-4050.md) | High | Chromium: CVE-2025-4050 Out of bounds memory access in DevTools | 8.8 | 0.0044 |  |
| [CVE-2025-29825](https://patchblox.com/security/data/cve/CVE-2025-29825.md) | Routine | Microsoft Edge (Chromium-based) Spoofing Vulnerability | 6.5 | 0.0089 |  |
| [CVE-2025-4051](https://patchblox.com/security/data/cve/CVE-2025-4051.md) | Routine | Chromium: CVE-2025-4051 Insufficient data validation in DevTools | 6.3 | 0.0028 |  |

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Data as of 2026-11-11T19:49:26Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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