CVE-2026-87509

Local code execution via Updater authorization failure

Published Sep 9, 2026 · Updated Sep 10, 2026

Incorrect authorization in Google Chrome Updater before 153.0.8010.36 on Windows allows local users to execute arbitrary code outside the sandbox. Google has not published which Updater authorization check fails or how the local program crosses the sandbox boundary. Exploitation requires local program execution on Windows, with no user interaction, and grants code execution outside Chrome's sandbox.

CVSS severity8.1
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Google Chrome Updater before 153.0.8010.36 on Windows allows local users to execute arbitrary code outside the sandbox. Google has not published which Updater authorization check fails or how the local program crosses the sandbox boundary. Exploitation requires local program execution on Windows, with no user interaction, and grants code execution outside Chrome's sandbox.

The record

CVE
CVE-2026-87509
Published
Sep 9, 2026
Updated
Sep 10, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-863, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=153.0.8010.36 <153.0.8010.36

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=153.0.8010.36 <153.0.8010.36

Published CVSS scores

8.1CISA ADPCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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