CVE-2004-1639: Mozilla Firefox before 0.10, Mozilla 5.0, and Gecko 20040913 allows remote attackers to cause a denial of s...

Security readout for executives and security teams

This is an old browser denial-of-service issue. A malicious or malformed file presented as HTML could make affected Mozilla Firefox or Gecko-based browsers stop responding, crash, or consume memory. It does not indicate data theft or code execution in the supplied sources. Exposure is most likely limited to legacy systems, archived builds, kiosks, lab environments, or embedded applications still using the named 2004-era Mozilla/Gecko versions. Low priority for modern environments, but remove it from any legacy system that still opens untrusted content. The business risk is interruption of an old browser process rather than system compromise, based on available sources. Mitigation focus: Inventory browsers and embedded Gecko runtimes for the named affected versions.; Retire or upgrade Mozilla Firefox before 0.10 and Gecko 20040913 builds.; Check Mozilla or downstream vendor guidance for exact replacement versions..

Prepared

Jun 30, 2026, 00:10 UTC (UTC+00:00)

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