{"cve_id":"CVE-2021-37973","published":"2021-10-08T22:15:08.287000+00:00","last_modified":"2026-06-17T04:01:19.780000+00:00","vuln_status":"Analyzed","description":"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_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","base_score":9.6,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"REQUIRED","scope":"CHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-416"],"in_kev":true,"kev_date_added":"2021-11-03","kev_ransomware":false,"epss_score":0.11735,"epss_percentile":0.96071,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":true,"grant_access":"PRIV","caps":["CODE_EXEC","PRIV_GAIN"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:49:31.857362+00:00","first_seen":"2021-10-08T22:15:08.287000+00:00","kev_first_seen":"2021-11-03T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["debian","fedoraproject","google"],"products":["chrome","debian_linux","fedora"],"affected":[{"vendor":"debian","product":"debian_linux","ranges":["10.0","11.0"]},{"vendor":"fedoraproject","product":"fedora","ranges":["33","35"]},{"vendor":"google","product":"chrome","ranges":["< 94.0.4606.61"]}]}