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PatchSiren cyber security CVE debrief

CVE-2026-10021 Google CVE debrief

CVE-2026-10021 is a medium-severity vulnerability in Google Chrome affecting versions prior to 148.0.7778.216. The flaw stems from insufficient validation of untrusted input in the browser's USB subsystem, enabling remote code execution when a user visits a malicious HTML page. The vulnerability was disclosed on May 28, 2026, with Google releasing a stable channel update to address the issue. The root cause is classified as CWE-20 (Improper Input Validation). No known exploitation in the wild or ransomware campaign use has been reported, and the vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-28
Original CVE updated
2026-07-21
Advisory published
2026-05-28
Advisory updated
2026-07-21

Who should care

Organizations with managed Chrome deployments, security teams responsible for browser security, endpoint protection teams, and users who handle sensitive data through web browsers. Particularly relevant for environments where WebUSB access is enabled or where users may visit untrusted web content.

Technical summary

The vulnerability exists in Chrome's USB handling code where untrusted input from web content is not properly validated. A crafted HTML page can exploit this flaw to execute arbitrary code within the browser process. The attack vector requires user interaction (visiting a malicious page) and leverages the WebUSB API or related USB subsystem components. The medium severity rating reflects the need for user interaction and the sandboxed nature of Chrome's renderer processes, though successful exploitation could lead to code execution with the privileges of the browser process.

Defensive priority

medium

Recommended defensive actions

  • Update Google Chrome to version 148.0.7778.216 or later
  • Verify automatic updates are enabled for Chrome installations
  • Review browser extension permissions and remove untrusted extensions
  • Implement network segmentation to limit browser access to sensitive internal resources
  • Consider application control policies to restrict execution of untrusted binaries
  • Monitor for suspicious USB-related browser permissions or WebUSB API usage

Evidence notes

Official disclosure via Chrome Releases blog and Chromium issue tracker. CVE published and modified 2026-05-28T23:16:43.990Z.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-10021 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-10021

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-10021 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-10021

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.