Description
Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445.
Published: 2026-05-08
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 11 May 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Mikrotik
Mikrotik routeros
Vendors & Products Mikrotik
Mikrotik routeros

Fri, 08 May 2026 23:00:00 +0000

Type Values Removed Values Added
Title RouterOS SMB Service Denial of Service Vulnerability

Fri, 08 May 2026 21:00:00 +0000

Type Values Removed Values Added
Title SMB Service Denial of Service in Mikrotik RouterOS
Weaknesses CWE-120

Fri, 08 May 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 08 May 2026 06:45:00 +0000

Type Values Removed Values Added
Title SMB Service Denial of Service in Mikrotik RouterOS
Weaknesses CWE-120

Fri, 08 May 2026 05:45:00 +0000

Type Values Removed Values Added
Description Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445.
References

Subscriptions

Mikrotik Routeros
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-08T14:00:45.540Z

Reserved: 2024-02-26T00:00:00.000Z

Link: CVE-2024-27686

cve-icon Vulnrichment

Updated: 2026-05-08T14:00:41.769Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-08T06:16:09.003

Modified: 2026-05-08T16:02:14.343

Link: CVE-2024-27686

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T16:11:49Z

Weaknesses