Review reviewHigh

CVE-2026-57989

Microsoft Microsoft Edge (Chromium-based), edge chromium

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

CVSS
7.4
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.27
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.4

Vulnerability overview

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

Affected product and versions

Product
Microsoft Microsoft Edge (Chromium-based), edge chromium
Affected versions
>= 1.0.0.0 < 150.0.4078.99, < 150.0.4078.99
Fixed versions
150.0.4078.99

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:L/PR:N/UI:R/S:C/C:H/I:N/A:N
CWE
CWE-346
CVE-2026-57989 — Microsoft Microsoft Edge (Chromium-based), edge chromium | SECUFOCUS NOW