# CVE-2021-37973

> Use after free in Portals in Google Chrome prior to 94.0.4606.61 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

- **CVSS:** 9.6 (CRITICAL)
- **EPSS:** 6.5%
- **CISA KEV:** yes
- **CWE:** CWE-416

Canonical: https://intel.threadlinqs.com/cve/CVE-2021-37973
Full threat coverage + IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp