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Vulnerabilities

Security incident · CVE-2011-10016

Real Networks Netzip Classic version 7.5.1.86 is vulnerable to a stack-based buffer overflow when parsing a specially crafted ZIP archive.

Published Aug 13, 2025 · catalog updated Apr 7, 2026 · RealNetworks Inc. Netzip Classic

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2011-10016. EPSS is 0.51%. Act only if a listed version of RealNetworks Inc. Netzip Classic is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.51%
Remediation
Vendor / distro source
Affected products
vendor RealNetworks Inc. Netzip Classic 7.5.1.86

Real Networks Netzip Classic version 7.5.1.86 is vulnerable to a stack-based buffer overflow when parsing a specially crafted ZIP archive. The vulnerability is triggered when the application attempts to process a file name within the archive that exceeds the expected buffer size. Exploitation allows arbitrary code execution under the context of the victim user when the ZIP file is opened.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor RealNetworks Inc. Netzip Classic 7.5.1.867.5.1.86

How to fix CVE-2011-10016

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2011-10016. EPSS is 0.51%. Act only if a listed version of RealNetworks Inc. Netzip Classic is installed.

Which versions are affected?

Compare what you have installed with RealNetworks Inc. Netzip Classic 7.5.1.86 7.5.1.86. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.51%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 13, 2025 · EUVD

    Detected

    Real Networks Netzip Classic version 7.5.1.86 is vulnerable to a stack-based buffer overflow when parsing a specially crafted ZIP archive. The vulnerability is triggered when the application attempts to process a file name within the archive that exceeds the expected buffer size. Exploitation allows arbitrary code execution under the context of the victim user when the ZIP file is opened.

  2. Apr 7, 2026 · EUVD

    Updated

    Real Networks Netzip Classic version 7.5.1.86 is vulnerable to a stack-based buffer overflow when parsing a specially crafted ZIP archive. The vulnerability is triggered when the application attempts to process a file name within the archive that exceeds the expected buffer size. Exploitation allows arbitrary code execution under the context of the victim user when the ZIP file is opened.

Sources

  • CVE.orgVulnerability recordCVE-2011-10016

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2011-10016

    30-day exploitation probability 0.51%

    first.org
  • EUVDVulnerability recordEUVD-2011-5243

    Real Networks Netzip Classic version 7.5.1.86 is vulnerable to a stack-based buffer overflow when parsing a specially crafted ZIP archive. The vulnerability is triggered when the application attempts to process a file name within the archive that exceeds the expected buffer size.

    euvd.enisa.europa.eu
  • Metasploit ModulesPublic exploit moduleexploit_windows/fileformat/real_networks_netzip_bof

    Public module reference (good). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Metasploit ModulesOct 29, 2026
  • FIRST EPSSOct 24, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026