Intel

CVE-2026-58276

edge_chromium: Use After Free (CVE-2026-58276)

highEPSS 0.6%

Affected

  • microsoft/edge_chromium lt *..150.0.4078.48

Description

Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Source: BSI WID PortalBSI CSAFcvelistv5NVD (NIST)CVE.org (MITRE)Microsoft Security Update Guide

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

microsoftedge_chromium
150.0.4078.48fixed from 150.0.4078.48

Metrics

XIEM Effective CVSS
7.5
Source: nvd-v3
EPSS percentile
47.5 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
high
Priority score
76.90
Exploit maturity
no public PoC known
CVSS v3
7.5
EPSS score
0.6 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-07-03 21:17 UTC
CWE
CWE-416

Weakness classes (CWE)

  • CWE-416Variant

    Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-07-07 05:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-58276","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI… → {"id":"CVE-2026-58276","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  2. Initial Analysis2026-07-06 19:21 UTC· nvd@nist.gov
    • CPE Configuration: OR *cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:-:*:*:* versions up to (excluding) 150.0.4078.48
    • Reference Type: Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58276 Types: Vendor Advisory
  3. CVE Modified2026-07-06 12:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-58276","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  4. New CVE Received2026-07-03 21:17 UTC· secure@microsoft.com
    • Affected: Microsoft Edge (Chromium-based)
    • Description: Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
    • CVSS V3.1: AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
    • CWE: CWE-416

Linked advisories