CVE-2026-55945 | BDVDB-2026-345484 Detail

MicrosoftMicrosoft 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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: local.

Weaknesses#

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

References#

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55945

Exploit#

No public exploit known

History#

Version 12026-07-03Record published in the CVE List.
Version 22026-11-01Most recent update recorded in the CVE List.

Published

Published: 2026-07-03
Last modified: 2026-11-01

Vendor information

Vendor: Microsoft
Product: Microsoft Edge (Chromium-based)

All Microsoft vulnerabilities

Score

4.2 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 8.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Race Condition

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 1.0.0.0 and < 150.0.4078.48
Fixed
150.0.4078.48

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.2 Medium

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Privileges Required	Low
User Interaction	None
Scope	Changed
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).