Vulnerability in Microsoft Edge Chromium
CVE-2026-58289
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.020 (79.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Microsoft Edge Chromium
- Microsoft Edge (Chromium-Based) — versions 1.0.0.0
Weakness classification (CWE)
References
- Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-58289?
- CVE-2026-58289 is a critical-severity vulnerability in Microsoft Edge Chromium, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.0/10. Published 2026-07-03.
- How severe is CVE-2026-58289?
- Critical severity. CVSS v3 base score is 9.0 out of 10.