An issue was discovered in the Winbox service of MikroTik RouterOS long-term release v6.43.13 through v6.49.13 and stable v6.43 through v7.17.2. A patch is available in the stable release v6.49.18. A discrepancy in response size between connection attempts made with a valid username and those with an invalid username allows attackers to enumerate for valid accounts.
| Software | From | Fixed in |
|---|---|---|
| mikrotik / routeros | 6.43 | 6.49.18 |
| mikrotik / routeros | 6.43.13 | 6.49.13.x |
| mikrotik / routeros | 7.1 | 7.18 |