# CVE-2025-6556: Chromium: CVE-2025-6556 Insufficient policy enforcement in Loader

CVE-2025-6556 is fixed in 7 products on 2 platforms, first by Microsoft Edge Dev 139.0.3365.2, released June 10, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-6556
- Priority: Routine
- CVSS: 5.4 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 24, 2025
- Weakness: CWE-288: Authentication Bypass Using an Alternate Path or Channel
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-6556

## Description

<p>This CVE was assigned by Chrome.  Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see <a href="https://chromereleases.googleblog.com/2025">Google Chrome Releases</a> for more information.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Google Chrome (EXE) | 144.0.7559.133 | [Google Chrome (EXE) 144.0.7559.133](https://patchblox.com/security/data/fix/windows-app/google.chrome.exe-144.0.7559.133.md) | Feb 3, 2026 |
| Windows apps | Google Chrome Dev (EXE) | 144.0.7534.3 | [Google Chrome Dev (EXE) 144.0.7534.3](https://patchblox.com/security/data/fix/windows-app/google.chrome.dev.exe-144.0.7534.3.md) | Nov 20, 2025 |
| Windows apps | Microsoft Edge | 138.0.3351.55 | [Microsoft Edge 138.0.3351.55](https://patchblox.com/security/data/fix/windows-app/microsoft.edge-138.0.3351.55.md) | Jun 26, 2025 |
| Windows apps | Microsoft Edge Beta | 138.0.3351.55 | [Microsoft Edge Beta 138.0.3351.55](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.beta-138.0.3351.55.md) | Jun 26, 2025 |
| Windows apps | Microsoft Edge Dev | 139.0.3365.2 | [Microsoft Edge Dev 139.0.3365.2](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.dev-139.0.3365.2.md) | Jun 10, 2025 |
| Windows apps | Microsoft Edge WebView2 Runtime | 138.0.3351.55 | [Microsoft Edge WebView2 Runtime 138.0.3351.55](https://patchblox.com/security/data/fix/windows-app/microsoft.edgewebview2runtime-138.0.3351.55.md) | Jun 26, 2025 |
| Linux | chromium Debian 12.15 (bookworm) | 138.0.7204.49-1~deb12u1 | [DEBIAN-CVE-2025-6556](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6556.md) | Jun 24, 2025 |
| Linux | chromium Debian 13.5 (trixie) | 138.0.7204.49-1 | [DEBIAN-CVE-2025-6556](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6556.md) | Jun 24, 2025 |
| Linux | chromium Debian 14 | 138.0.7204.49-1 | [DEBIAN-CVE-2025-6556](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6556.md) | Jun 24, 2025 |

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Data as of 2026-11-08T06:59:42Z 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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