CVE-2011-1221: n/a vulnerability

CVE-2011-1221: Cross-zone scripting vulnerability in the RealPlayer ActiveX control in RealNetworks RealPlayer 11.0 throug...

Cross-zone scripting vulnerability in the RealPlayer ActiveX control in RealNetworks RealPlayer 11.0 through 11.1 and 14.0.0 through 14.0.5, RealPlayer SP 1.0 through 1.1.5, and RealPlayer Enterprise 2.0 through 2.1.5 allows remote attackers to inject arbitrary web script or HTML in the Local Zone via a local HTML document, a different vulnerability than CVE-2011-2947.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 17, 2024, 02:32 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old RealPlayer ActiveX issue affecting specified RealPlayer, RealPlayer SP, and RealPlayer Enterprise versions. A remote attacker could cause script or HTML to run in the browser's Local Zone through a local HTML document, which matters mainly on legacy Windows systems that still allow this control. Exposure is most likely on legacy Windows endpoints with affected RealPlayer ActiveX components installed and usable by the browser. Modern environments without RealPlayer ActiveX, or where ActiveX is blocked, are less likely to be exposed based on the provided sources. Treat this as a legacy technology cleanup item unless affected RealPlayer ActiveX is still present. The business concern is older endpoint exposure through browser-local trust boundaries, not a currently proven mass-exploitation campaign in the provided evidence. Mitigation focus: Inventory endpoints for the affected RealPlayer product versions listed in the CVE.; Review the RealNetworks advisory for supported updates or vendor-directed remediation.; Remove RealPlayer ActiveX components where there is no business requirement..

Prepared: Jun 27, 2026, 17:48 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 4, 2011, 22:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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