Unspecified vulnerability in the RV20 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote attackers to execute arbitrary code via unknown vectors.
CVE-2011-4253
NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 4%CVSS: —Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EPSS
- 89.7%
- KEV
- Not listed
Published
November 24, 2011
Last Modified
April 29, 2026
References (2)
- cve@mitrehttp://service.real.com/realplayer/security/11182011_player/en/
- af854a3a-2127-422b-91ae-364da2661108http://service.real.com/realplayer/security/11182011_player/en/
Frequently asked(4)
What is CVE-2011-4253?
CVE-2011-4253 is a none vulnerability published on November 24, 2011. Unspecified vulnerability in the RV20 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote attackers to execute arbitrary code via unknown vectors.
When was CVE-2011-4253 disclosed?
CVE-2011-4253 was first published in the National Vulnerability Database on November 24, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-4253 actively exploited?
CVE-2011-4253 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2011-4253?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4253, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
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