The vulnerability of Firefox, Firefox ESR, and the Thunderbird email client is related to errors in displaying the percent symbol in directories %HOMEPATH% and %APPDATA%. This allows an attacker to trigger a service failure or execute arbitrary code.

The vulnerability of Firefox, Firefox ESR, and the Thunderbird email client on Windows operating systems is related to display errors for the percent symbol in directories %HOMEPATH% and %APPDATA%. Exploiting this vulnerability can allow an attacker to cause service failures or execute arbitrary...