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.

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

EPSS: 0.010 (58.8th percentile) — read the EPSS interpretation.

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.

Affected products

Microsoft Edge_chromium
Microsoft Edge (Chromium-based) — versions 1.0.0.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

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.