Vulnerability Intelligence Report
Google Chromium Portals Use-After-Free Vulnerability
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
9.6
CRITICAL
Exploitability:2.9
Impact Score:6.1
EPSS Probability:11.73%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-416 ↗CWE-416 Use After Free
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Chrome | unspecified < 94.0.4606.61 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Chrome · Vendor · USA |
| Reserved | 2021-08-03T00:00:00 |
| Published | 2021-10-08T21:40:09 |
| Last Updated | 2025-10-21T23:25:29 |
Community Chatter & Buzz