Review reviewHigh

CVE-2026-58281

Microsoft Microsoft Edge (Chromium-based), edge chromium

Deserialization of untrusted data in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

CVSS
8.3
EPSS
0.69%
48.7% percentile
CISA KEV
Not listed
Published
2026.07.12
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.69%
Technical severityCVSS 8.3

Vulnerability overview

Deserialization of untrusted data in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Affected product and versions

Product
Microsoft Microsoft Edge (Chromium-based), edge chromium
Affected versions
>= 1.0.0.0 < 150.0.4078.48, < 150.0.4078.48
Fixed versions
150.0.4078.48

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Microsoft Edge (Chromium-based), edge chromium and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
CWE-502
CVE-2026-58281 — Microsoft Microsoft Edge (Chromium-based), edge chromium | SECUFOCUS NOW