This policy setting determines whether Internet Explorer MIME sniffing will prevent promotion of a file of one type to a more dangerous file type.
If you enable this policy setting, MIME sniffing will never promote a file of one type to a more dangerous file type.
If you disable this policy setting, Internet Explorer processes will allow a MIME sniff promoting a file of one type to a more dangerous file type.
If you do not configure this policy setting, MIME sniffing will never promote a file of one type to a more dangerous file type.
| Registry Path | Value Name | Value Type | Value |
|---|---|---|---|
| Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING | (Reserved) | REG_SZ | 1 |
| Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING | explorer.exe | REG_SZ | 1 |
| Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING | iexplore.exe | REG_SZ | 1 |
| Registry Hive | Registry Path | Value Name | Value Type | Value |
|---|---|---|---|---|
| HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER | Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING | (Reserved) | REG_SZ | 0 |
| HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER | Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING | explorer.exe | REG_SZ | 0 |
| HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER | Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING | iexplore.exe | REG_SZ | 0 |