CVE-2026-58596 in Microsoft Edge Chromium
Microsoft Edge Chromium has an untrusted pointer dereference issue that can let an attacker gain elevated access over the network.
Quick answer
Microsoft Edge Chromium should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- Microsoft Edge Chromium versions before 150.0.4078.48
Fixed versions
- Microsoft Edge Chromium 150.0.4078.48 or later
How to fix it
Update Microsoft Edge Chromium. The old version has a Microsoft security bug that can expose data or raise access.
- Install the latest Microsoft security update for the affected product.
- Restart the app or device if the update asks for it.
- Block use of outdated builds in your software inventory.
- Ask users not to open files or links from unknown sources.
Scan now. Google sign-in is only needed to unlock fix guidance.
Verify the fix
- Confirm the installed version matches Microsoft Edge Chromium 150.0.4078.48 or later.
- Run your vulnerability scanner again and confirm this CVE is gone.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-58596?
Microsoft Edge Chromium versions listed as affected should be reviewed: Microsoft Edge Chromium versions before 150.0.4078.48.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.