Deserialization in Microsoft Edge Chromium
CVE-2026-58281
Deserialization of untrusted data in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (60.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · 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-2026-58281?
- CVE-2026-58281 is a high-severity vulnerability in Microsoft Edge Chromium, classified under Deserialization of Untrusted Data. CVSS score: 8.3/10. Published 2026-07-11.
- How severe is CVE-2026-58281?
- High severity. CVSS v3 base score is 8.3 out of 10.