The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nine | 9folders | - (including) | - (including) |
| Apple | - (including) | - (including) | |
| Airmail | Bloop | - (including) | - (including) |
| Emclient | Emclient | - (including) | - (including) |
| Maildroid | Flipdogsolutions | - (including) | - (including) |
| Mailmate | Freron | - (including) | - (including) |
| Evolution | Gnome | - (including) | - (including) |
| Gmail | - (including) | - (including) | |
| Horde_imp | Horde | - (including) | - (including) |
| Notes | Ibm | - (including) | - (including) |
| Kmail | Kde | - (including) | - (including) |
| Trojita | Kde | - (including) | - (including) |
| Outlook | Microsoft | 2007 (including) | 2007 (including) |
| Outlook | Microsoft | 2010 (including) | 2010 (including) |
| Outlook | Microsoft | 2013 (including) | 2013 (including) |
| Outlook | Microsoft | 2016 (including) | 2016 (including) |
| Thunderbird | Mozilla | - (including) | - (including) |
| Postbox | Postbox-inc | - (including) | - (including) |
| R2mail2 | R2mail2 | - (including) | - (including) |
| The_bat | Ritlabs | - (including) | - (including) |
| Evolution | Ubuntu | artful | * |
| Kmail | Ubuntu | artful | * |
| Kmail | Ubuntu | bionic | * |
| Kmail | Ubuntu | cosmic | * |
| Kmail | Ubuntu | disco | * |
| Kmail | Ubuntu | eoan | * |
| Kmail | Ubuntu | groovy | * |
| Kmail | Ubuntu | hirsute | * |
| Kmail | Ubuntu | impish | * |
| Kmail | Ubuntu | kinetic | * |
| Kmail | Ubuntu | lunar | * |
| Kmail | Ubuntu | mantic | * |
| Thunderbird | Ubuntu | artful | * |
| Thunderbird | Ubuntu | bionic | * |
| Thunderbird | Ubuntu | cosmic | * |
| Thunderbird | Ubuntu | devel | * |
| Thunderbird | Ubuntu | disco | * |
| Thunderbird | Ubuntu | eoan | * |
| Thunderbird | Ubuntu | focal | * |
| Thunderbird | Ubuntu | groovy | * |
| Thunderbird | Ubuntu | hirsute | * |
| Thunderbird | Ubuntu | impish | * |
| Thunderbird | Ubuntu | jammy | * |
| Thunderbird | Ubuntu | kinetic | * |
| Thunderbird | Ubuntu | lunar | * |
| Thunderbird | Ubuntu | mantic | * |
| Thunderbird | Ubuntu | noble | * |
| Thunderbird | Ubuntu | oracular | * |
| Thunderbird | Ubuntu | trusty | * |
| Thunderbird | Ubuntu | xenial | * |