CVE DATABASE / CVE-2018-7445
CVE-2018-7445
MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability
Confirmed exploited in the wild. Added 2022-09-08.
Federal remediation due 2022-09-29.
Required action: Apply updates per vendor instructions.
Summary
A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system. The overflow occurs before authentication takes place, so it is possible for an unauthenticated remote attacker to exploit it. All architectures and all devices running RouterOS before versions 6.41.3/6.42rc27 are vulnerable.
CVSS 3.1 breakdown
| Base score | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
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References
- http://seclists.org/fulldisclosure/2018/Mar/38
- http://www.securityfocus.com/bid/103427
- https://www.coresecurity.com/advisories/mikrotik-routeros-smb-buffer-overflow
- https://www.exploit-db.com/exploits/44290/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-7445
Data: NIST NVD + CISA KEV. NVD last modified 2025-11-07. Always verify against the vendor advisory before acting.