{"cve":"CVE-2009-4049","nvd":{"published":"2009-11-23T17:30:00.670","modified":"2026-06-16T23:12:56.080","status":"Modified","description":"Heap-based buffer overflow in aswRdr.sys (aka the TDI RDR driver) in avast! Home and Professional 4.8.1356.0 allows local users to cause a denial of service (memory corruption) or possibly gain privileges via crafted arguments to IOCTL 0x80002024.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-119"],"references":["http://secunia.com/advisories/37368","http://www.efblog.net/2009/11/avast-aswrdrsys-kernel-pool-corruption.html","http://www.securityfocus.com/archive/1/507891/100/0/threaded","http://www.securityfocus.com/bid/37031","http://www.vupen.com/english/advisories/2009/3266"],"products":["avast:avast_antivirus_home","avast:avast_antivirus_professional"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-4049","score":0.01096,"percentile":0.65562,"date":"2026-11-01"},"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."]}