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CVE-2026-58289

Microsoft Edge Chromium type confusion

9.0 CRITICALEPSS 1.99%
  1. Published3 Jul 2026

Description

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Microsoft Edge Chromium< 150.0.4078.48

Remediation

Fixed in
Microsoft Edge Chromium≥ 150.0.4078.48

References

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Frequently asked

Is CVE-2026-58289 being actively exploited?

CVE-2026-58289 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.99%.

How severe is CVE-2026-58289?

CVE-2026-58289 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 1.99% probability of exploitation.

Which products are affected by CVE-2026-58289?

Affected products include Microsoft Edge Chromium.

How do I fix CVE-2026-58289?

Upgrade affected software to a fixed version, for example Microsoft Edge Chromium 150.0.4078.48 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-58289 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.