{"cve":"CVE-2009-2069","nvd":{"published":"2009-06-15T19:30:05.687","modified":"2026-06-16T23:08:41.987","status":"Modified","description":"Microsoft Internet Explorer before 8 displays a cached certificate for a (1) 4xx or (2) 5xx CONNECT response page returned by a proxy server, which allows man-in-the-middle attackers to spoof an arbitrary https site by letting a browser obtain a valid certificate from this site during one request, and then sending the browser a crafted 502 response page upon a subsequent request.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-287"],"references":["http://research.microsoft.com/apps/pubs/default.aspx?id=79323","http://research.microsoft.com/pubs/79323/pbp-final-with-update.pdf","http://www.securityfocus.com/bid/35411","http://research.microsoft.com/apps/pubs/default.aspx?id=79323","http://research.microsoft.com/pubs/79323/pbp-final-with-update.pdf"],"products":["microsoft:ie","microsoft:internet_explorer"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-2069","score":0.02195,"percentile":0.82473,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}