{"id":"CVE-2021-37976","kind":"vulnerability","aliases":["CVE-2021-37976"],"related":[],"title":"Google Chromium: Google Chromium Information Disclosure Vulnerability","description":"Google Chromium contains an information disclosure vulnerability within the core memory component that allows a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Google Chromium has an information disclosure flaw in its core memory component that lets a remote attacker read potentially sensitive data from process memory. The attacker only needs to lure a victim to a crafted HTML page.","severity":"high","cvss":6.5,"epss":0.19901,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Google Chromium","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browsers","chromium","exploited","google-chrome","microsoft-edge","opera","runtime"],"not_affected_if":["already-patched-browser"],"how_to_check":"Check the installed browser version (Chrome: chrome://settings/help; Edge: edge://settings/help) against the vendor's fixed release.","fix":"Update Chrome, Edge, Opera or other Chromium-based browsers to the vendor's patched release, as CISA directs.\nFixed version not stated in the sources.","status":"open","published_at":"2021-10-08T22:15:08+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:37:27+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T21:37:27Z","model":"claude-haiku-5-5","output":{"fix":"Update Chrome, Edge, Opera or other Chromium-based browsers to the vendor's patched release, as CISA directs.\nFixed version not stated in the sources.","reach":"internet","impact":"medium","summary":"Google Chromium has an information disclosure flaw in its core memory component that lets a remote attacker read potentially sensitive data from process memory. The attacker only needs to lure a victim to a crafted HTML page.","category":"runtime","who_cares":["chromium","google-chrome","microsoft-edge","opera","browsers"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads sensitive data from browser process memory via a crafted page.","analyst_note":"Confirm the patched Chromium version and the exact fixed release from the vendor advisory linked by CISA KEV; sources here do not name it.","how_to_check":"Check the installed browser version (Chrome: chrome://settings/help; Edge: edge://settings/help) against the vendor's fixed release.\nunknown\nunknown","needs_analyst":true,"not_affected_if":["already-patched-browser"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000499,"input_tokens":2885,"output_tokens":420,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2021':9A,12A '-37976':10A,13A 'action':117C 'affect':97C 'allow':77C 'appli':118C 'attack':43B,52B,80C 'browser':16B,100C 'chrome':21B,110C 'chromium':2A,4A,15A,17B,28B,65C,103C 'cisa':115C 'compon':38B,75C 'contain':66C 'core':36B,73C 'could':96C 'craft':61B,91C 'cve':8A,11A 'data':47B 'disclosur':6A,32B,69C 'edg':24B,112C 'exploit':18B 'flaw':33B 'googl':1A,3A,20B,27B,64C,109C 'google':14A 'google-chrom':19B 'html':62B,92C 'includ':104C 'inform':5A,31B,68C,85C 'instruct':122C 'let':40B 'limit':107C 'lure':56B 'memori':37B,50B,74C,88C 'microsoft':23B,111C 'microsoft-edg':22B 'multipl':98C 'need':54B 'obtain':82C 'opera':25B,114C 'page':63B,93C 'per':120C 'potenti':45B,83C 'process':49B,87C 'read':44B 'remot':42B,79C 'requir':116C 'runtim':26B 'sensit':46B,84C 'updat':119C 'util':102C 'vendor':121C 'via':89C 'victim':58B 'vulner':7A,70C,95C 'web':99C 'within':71C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-10-08T22:15:08+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-37976","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-37976","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T12:39:25+00:00","note":null},{"source":"epss","external_id":"CVE-2021-37976","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-37976","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2021-37976","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-37976","severity":null,"published_at":"2021-10-08T22:15:08+00:00","modified_at":"2026-06-17T04:01:20+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}