Intel

CVE-2026-55945

edge_chromium: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CVE-2026-55945)

mediumEPSS 0.2%

Affected

  • microsoft/edge_chromium lt *..150.0.4078.48

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to disclose information locally.

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
4.2
Source: nvd-v3
EPSS percentile
7.5 %
Low — this CVE sits in the lower 10% of all CVEs scored today.
KEV status
—
Show all metrics
Severity
medium
Priority score
42.79
Exploit maturity
no public PoC known
CVSS v3
4.2
EPSS score
0.2 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-07-03 21:17 UTC
CWE
CWE-362

Weakness classes (CWE)

  • CWE-362Class

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

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

  1. CVE Modified2026-07-06 13:17 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-55945","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  2. New CVE Received2026-07-03 21:17 UTC· secure@microsoft.com
    • Affected: Microsoft Edge (Chromium-based)
    • Description: Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to disclose information locally.
    • CVSS V3.1: AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
    • CWE: CWE-362

Linked advisories