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

Source: https://junglewise.ai/threats/cve-2018-7445-mikrotik-routeros-stack-based-buffer-overflow-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-09-08. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2018-7445 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-09-08

A stack-based buffer overflow vulnerability exists in the MikroTik RouterOS SMB service when processing NetBIOS session request messages. Unauthenticated remote attackers can exploit this to execute arbitrary code on the device.

Technologies: [MikroTik RouterOS](https://junglewise.ai/threats/technologies/routeros). Vendors: [MikroTik](https://junglewise.ai/threats/vendors/mikrotik).

## Quick answers

**Is CVE-2018-7445 exploited in the wild?** Yes. CVE-2018-7445 is known to be exploited in the wild, first recorded on 8 September 2022. Treat it as urgent.

**How severe is CVE-2018-7445?** Critical severity, with a CVSS score of 9.8, published 8 September 2022.

**Which products and versions are affected?** MikroTik RouterOS before 6.41.3, before 6.42rc27.

**Is there a fix for CVE-2018-7445?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2018-7445 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2018-7445?** Check whether you run MikroTik RouterOS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- MikroTik RouterOS before 6.41.3, before 6.42rc27

## Timeline

- 2018-03-12: disclosed: Full Disclosure mailing list post
- 2018-04-24: other: Initial NIST analysis
- 2022-09-08: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-09-29: other: CISA required action due date

## Related threats

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- [MikroTik RouterOS integer overflow in ipt_SAME module](https://junglewise.ai/threats/cve-2026-112158-a-weakness-has-been-identified-in-mikrotik-routeros-up-to-6-40-5)
- [MikroTik RouterOS WinBox incorrect authorization in authentication](https://junglewise.ai/threats/cve-2026-103903-an-incorrect-authorization-vulnerability-in-the-winbox)
- [MikroTik RouterOS integer underflow](https://junglewise.ai/threats/cve-2026-84411-mikrotik-routeros)
- [MikroTik RouterOS improper input validation in BGP labelled-VPN NLRI](https://junglewise.ai/threats/cve-2026-93345-mikrotik-routeros-before-7-25beta4-contains-an-improper-input)