{"cve":"CVE-2008-5538","nvd":{"published":"2008-12-12T18:30:03.017","modified":"2026-06-16T23:00:30.290","status":"Modified","description":"Prevx Prevx1 2, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detection of malware in an HTML document by placing an MZ header (aka \"EXE info\") at the beginning, and modifying the filename to have (1) no extension, (2) a .txt extension, or (3) a .jpg extension, as demonstrated by a document containing a CVE-2006-5745 exploit.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://securityreason.com/securityalert/4723","http://www.securityfocus.com/archive/1/498995/100/0/threaded","http://www.securityfocus.com/archive/1/499043/100/0/threaded","https://exchange.xforce.ibmcloud.com/vulnerabilities/47435","http://securityreason.com/securityalert/4723"],"products":["prevx:prevx1"],"source":"nvd","synced_at":"2026-10-19T19:53:23.791937413+00:00"},"epss":{"cve":"CVE-2008-5538","score":0.01938,"percentile":0.80094,"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."]}