The host is installed with Google chrome before 87.0.4280.88, Edge Chromium before 87.0.664.57, Mozilla Firefox before 84, Mozilla Firefox ESR before 78.6 or Mozilla Thunderbird before 78.6 and is prone to an uninitialized use vulnerability. A flaw is present in the application, which fails to handle unspecified vectors. Successful exploitation allows attackers to cause unspecified impact.