CVE intelligence

CVE-2026-87503

Vulnerability intelligence

Published Sep 9, 2026Sources checked Oct 3, 2026

6.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-87503 and is rated Medium severity with a CVSS score of 6.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Release Notes

Vendor-listed releases

153.0.4234.32

CISA KEVNot listedBased on the latest collected catalog

EPSS0.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-87503?

Inappropriate implementation in Downloads in Google Chrome on on Android prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)