{"cve":"CVE-2004-0840","nvd":{"published":"2004-11-03T05:00:00.000","modified":"2026-06-16T22:06:29.843","status":"Modified","description":"The SMTP (Simple Mail Transfer Protocol) component of Microsoft Windows XP 64-bit Edition, Windows Server 2003, Windows Server 2003 64-bit Edition, and the Exchange Routing Engine component of Exchange Server 2003, allows remote attackers to execute arbitrary code via a malicious DNS response message containing length values that are not properly validated.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://www.kb.cert.org/vuls/id/394792","http://www.securityfocus.com/bid/11374","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-035","https://exchange.xforce.ibmcloud.com/vulnerabilities/17621","https://exchange.xforce.ibmcloud.com/vulnerabilities/17660"],"products":["microsoft:exchange_server","microsoft:windows_server_2003","microsoft:windows_xp"],"source":"nvd","synced_at":"2026-10-19T19:37:11.487553034+00:00"},"epss":{"cve":"CVE-2004-0840","score":0.30291,"percentile":0.98225,"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."]}