# CVE-2018-7445: MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability

> CVE-2018-7445: MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-7445
Last updated: 2025-10-21T23:45:55Z

- Published: 2018-03-19 21:00 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 65.8%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-09-08, federal due date 2022-09-29, ransomware use: Unknown

## Description

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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- MikroTik: RouterOS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-7445)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-7445)
- [http://seclists.org/fulldisclosure/2018/Mar/38](http://seclists.org/fulldisclosure/2018/Mar/38)
- [https://www.coresecurity.com/advisories/mikrotik-routeros-smb-buffer-overflow](https://www.coresecurity.com/advisories/mikrotik-routeros-smb-buffer-overflow)
- [https://www.exploit-db.com/exploits/44290/](https://www.exploit-db.com/exploits/44290/)
- [http://www.securityfocus.com/bid/103427](http://www.securityfocus.com/bid/103427)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2018-7445 · Markdown: https://rewindex.com/cve/CVE-2018-7445.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-7445 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:49:21.373Z