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RealplayerApplication · Realnetworks

CVE-2011-4262

HIGH · 9.3 CVSS v2.0 Published 2011-11-24
Fix available
A fix is available. Upgrade to after 14.0.7 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Unspecified vulnerability in RealNetworks RealPlayer before 15.0.0 allows remote attackers to execute arbitrary code via a crafted MP4 file.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Memory corruption vulnerability in RealPlayer's MP4 file parsing allows remote attackers to execute arbitrary code via specially crafted MP4 files. The vulnerability exists in versions prior to 15.0.0 and is exploitable through user-assisted vectors such as opening malicious files.

MitigationUpgrade to RealPlayer 15.0.0 or later; implement user awareness training to avoid opening untrusted MP4 files; consider application whitelisting as defense-in-depth.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
RealplayerApplication
Affected:<= 14.0.7= 4= 5= 6= 7= 8= 10.0= 10.5= 11.0= 11.0.1= 11.0.2= 11.0.2.1744

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
M
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:M/Au:N/C:C/I:C/A:C

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check if RealPlayer is installed
    Look for RealPlayer installation in typical locations: C:\Program Files\Real\RealPlayer\, C:\Program Files (x86)\Real\RealPlayer\, or check Windows Registry under HKEY_LOCAL_MACHINE\SOFTWARE\RealNetworks or HKEY_CURRENT_USER\SOFTWARE\RealNetworks
    Affected if RealPlayer is found installed on the system
  2. Identify installed RealPlayer version
    Right-click on RealPlayer.exe in the installation directory, select Properties, then go to the Details tab to view the File Version. Alternatively, open RealPlayer and check Help > About RealPlayer
    Affected if The installed version is 14.0.7 or lower, or exactly versions 10.0, 10.5, 11.0, 11.0.1, 11.0.2, or 11.0.2.1744 (any version prior to 15.0.0)
  3. Verify MP4 file association with RealPlayer
    Check Windows Registry under HKEY_CLASSES_ROOT\.mp4 or HKEY_CURRENT_USER\Software\Classes\.mp4 to see if RealPlayer is associated with MP4 file handling
    Affected if RealPlayer is set as the default handler or one of the handlers for MP4 files
  4. Check if RealPlayer auto-opens or processes MP4 files
    Open RealPlayer, go to Tools > Preferences > File Types, or check the download/capture settings to see if MP4 is enabled for automatic playback
    Affected if MP4 file type is enabled for playback in RealPlayer settings

The system is affected if RealPlayer version 14.0.7 or lower (or any version prior to 15.0.0) is installed AND MP4 file handling is enabled, allowing user-assisted exploitation via malicious MP4 files.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 14.0.7
Interim mitigation

Upgrade to RealPlayer 15.0.0 or later; implement user awareness training to avoid opening untrusted MP4 files; consider application whitelisting as defense-in-depth.

Recommended fix Moderate confidence

RealPlayer 15.0.0 or later

  1. 1. Visit the official RealPlayer download page at service.real.com or the RealNetworks website
  2. 2. Download the latest version of RealPlayer (version 15.0.0 or later)
  3. 3. Uninstall the current version of RealPlayer from your system
  4. 4. Install the newly downloaded RealPlayer 15.0.0 or later version
  5. 5. Verify the installation by checking Help > About RealPlayer to confirm the version number
Caveat RealPlayer is an older product with limited ongoing support; ensure compatibility with your operating system before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Realplayer Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2011-4262 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data