CVE-2018-7445

CVE-2018-7445 is a critical-severity vulnerability in Mikrotik Routeros with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-09-08). The underlying weakness is classified as CWE-119.

Key facts

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.

Frequently asked questions

What is CVE-2018-7445?
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.
How severe is CVE-2018-7445?
CVE-2018-7445 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-7445 being actively exploited?
Yes. CVE-2018-7445 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-09-08, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-7445?
CVE-2018-7445 primarily affects Mikrotik Routeros. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-7445?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-7445 have an EU (EUVD) identifier?
Yes. CVE-2018-7445 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-19176. It is also flagged as exploited in the EUVD (since 2022-09-08).
When was CVE-2018-7445 published?
CVE-2018-7445 was published on 2018-03-19 and last updated on 2026-06-17.

References

Affected products (13)

More vulnerabilities in Mikrotik Routeros

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Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

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Threat intelligence

Threat-intel indicators referencing this CVE: