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Google Chrome EUVDEUVD-2026-74464

| CVE-2026-87509 HIGH
Incorrect Authorization (CWE-863)
2026-09-09 Chrome GHSA-fc2h-vhwj-9v22
8.1
CVSS 3.1 · Vendor: Chrome
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Severity by source

Vendor (Chrome) PRIMARY
8.1 HIGH
AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
vuln.today AI
8.1 HIGH

Local vector confirmed by description; AC:H reflects non-trivial Updater authorization bypass; PR:N as no elevated privileges required; S:C for sandbox escape to OS level.

3.1 AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
4.0 AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (Chrome).

CVSS VectorVendor: Chrome

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

Lifecycle Timeline

6
Metadata Corrected
Sep 09, 2026 - 15:40 vuln.today
tag: Authentication Bypass removed
Metadata Corrected
Sep 09, 2026 - 15:40 vuln.today
tag: Microsoft removed
Analysis Generated
Sep 09, 2026 - 15:31 vuln.today
Patch available
Sep 09, 2026 - 01:03 EUVD
CVE Published
Sep 09, 2026 - 00:10 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 09, 2026 - 00:10 cve.org
HIGH 8.1

DescriptionCVE.org

Incorrect authorization in Updater in Google Chrome on on Windows prior to 153.0.8010.36 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: Low)

AnalysisAI

Sandbox escape via incorrect authorization in the Chrome Updater component on Windows allows a local attacker to execute arbitrary code outside the browser's sandbox using a crafted local program. Affected versions are all Google Chrome releases prior to 153.0.8010.36 on Windows. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
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Exploit
technique details hidden
Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Requires local access to a Windows system running Google Chrome prior to 153.0.8010.36. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H scores 8.1, reflecting full-compromise impact (C:H/I:H/A:H) with scope change (S:C) due to sandbox escape, but tempered by local access requirement (AV:L) and high attack complexity (AC:H). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: Google Chrome 153.0.8010.36. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all Windows systems running Chrome and identify those below version 153.0.8010.36. …

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EUVD-2026-74464 vulnerability details – vuln.today

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