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CVE-2018-7445

9.8, critical Known exploited

MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
61% higher than 99.1% of scored CVEs
Exploitation
Confirmed in the wild
Published
19 Mar 20188 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 8 Sept 2022. US federal agencies had to remediate by 29 Sept 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

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.

Details

Vendor
MikroTik
Product
Routeros
Weakness
CWE-119 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References 5

Exploit code 3

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other MikroTik CVEs

Every MikroTik CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-67277 MikroTik RouterOS Missing Authentication for Critical Function Vulnerability KEV EPSS 2% 8.2, high
  • CVE-2026-67279 Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability KEV EPSS 1% 6.5, medium
  • CVE-2026-86060 MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability KEV EPSS 6% 9.8, critical
  • CVE-2018-14847 MikroTik Router OS Directory Traversal Vulnerability KEV EPSS 96% 9.1, critical
  • CVE-2026-67278 MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures across RSA-based services, including TLS/X.509 certificate validation and… EPSS 0.3% 9.1, critical
  • CVE-2026-67276 RouterOS does not compare the complete RSA public key when matching an SSH authentication request to an authorized user key, checking… EPSS 6% 8.1, high
  • CVE-2026-67281 Mikrotik RouterOS Path Traversal Vulnerability EPSS 0.7% 7.5, high

Beyond this page

Is CVE-2018-7445 in your network?

This page tells you how dangerous CVE-2018-7445 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2018-7445 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 16 Oct 2026, not the live upstream state.