CVE-2015-7776: Cybozu Garoon 3.x and 4.x before 4.2.0 does not properly restrict loading of IMG elements, which makes it e...

Security readout for executives and security teams

CVE-2015-7776 is a user-tracking weakness in Cybozu Garoon. A crafted HTML email could cause images to load in a way that lets a remote attacker track users. The provided sources do not cite data theft, account takeover, code execution, or active exploitation. Exposure is limited to organizations running Cybozu Garoon 3.x or 4.x before 4.2.0, especially where users receive or view HTML email in Garoon. Organizations not using Garoon, or already on 4.2.0 or later, are unlikely to be affected based on the provided description. Low priority unless the organization still runs an affected Garoon version. The issue can expose user activity and privacy information, but the provided sources do not support emergency treatment, active exploitation, or high-impact compromise. Mitigation focus: Confirm whether Cybozu Garoon is deployed and identify its exact version.; Upgrade affected Garoon 3.x or 4.x instances to 4.2.0 or later.; Review Cybozu support advisories for any version-specific guidance..

Prepared

Jun 13, 2026, 14:22 UTC (UTC+00:00)

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