{"id":"CVE-2011-4256","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-4256","generatedAt":"2026-10-27T22:05:30.399Z","title":"The RV30 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 does not initialize an unspecified index value, which allows remote attackers to execute arbitrary code via unknown vectors.","description":"The RV30 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 does not initialize an unspecified index value, which allows remote attackers to execute arbitrary code via unknown vectors.","published":"2011-11-24T11:55:08.000Z","lastModified":"2026-06-16T23:34:38.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":10,"severity":"HIGH","vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C"},"cwe":["CWE-94"],"affected":["realnetworks/realplayer"],"epss":{"score":0.04255,"percentile":0.90992,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://service.real.com/realplayer/security/11182011_player/en/","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://service.real.com/realplayer/security/11182011_player/en/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-4256","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}