{"cve":"CVE-2009-4257","nvd":{"published":"2010-01-25T19:30:01.573","modified":"2026-06-16T23:13:20.760","status":"Modified","description":"Heap-based buffer overflow in datatype/smil/common/smlpkt.cpp in smlrender.dll in RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10 and 11.0.0, and Helix Player 10.x and 11.0.0 allows remote attackers to execute arbitrary code via an SMIL file with crafted string lengths.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-119"],"references":["http://lists.helixcommunity.org/pipermail/datatype-cvs/2008-September/008678.html","http://secunia.com/advisories/38218","http://secunia.com/advisories/38450","http://securitytracker.com/id?1023489","http://service.real.com/realplayer/security/01192010_player/en/"],"products":["realnetworks:helix_player","realnetworks:realplayer","realnetworks:realplayer_enterprise","realnetworks:realplayer_sp"],"source":"nvd","synced_at":"2026-10-19T19:55:32.599380760+00:00"},"epss":{"cve":"CVE-2009-4257","score":0.08491,"percentile":0.95032,"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."]}