CVE-2025-2783: Google Chromium Mojo Sandbox Escape Vulnerability (Windows)
What It Is – A logic‑error in the Chromium Mojo sandbox on Windows allows a malicious process to escape the sandbox and execute code with the privileges of the browser. The flaw is tracked as CVE‑2025‑2783 and has been assigned a CVSS v3.1 base score of 8.8 (High).
Exploitability – No public exploit has been observed, but the vulnerability is exploitable in the wild once a malicious web page or extension is loaded.
Affected Products – Google Chrome, Microsoft Edge, Opera, and any other browser built on the Chromium engine that runs on Windows.
Why It Matters for Trust & Control Assurance
- Application isolation controls: The sandbox is a core control that limits the blast radius of a compromised browser; a bypass directly challenges the effectiveness of that control.
- Continuous evidence of patch hygiene: Enterprises must demonstrate timely remediation of high‑severity flaws to auditors and partners.
- Supply‑chain assurance: Chromium‑based browsers are a common component across many internal web‑apps; a single flaw can cascade to multiple business processes.
Recommended Actions
- Deploy the latest Chrome/Edge/Opera updates that contain the fix for CVE‑2025‑2783.
- Verify the installed browser version across all endpoints using an inventory tool.
- Enable browser‑level telemetry to detect anomalous sandbox‑escape attempts.
- Document the remediation in your control‑mapping repository to provide audit‑ready evidence.
Source: CISA KEV – CVE‑2025‑2783