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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

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This CVE is not in the KEV list.

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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a n/a affected
Version Status Constraints
n/a affected —

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Fixes

Solution

No solution given by the vendor.

Workaround

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References
Link Providers
https://github.com/ice-wzl/RouterOS-SMB-DOS-POC cve-icon cve-icon
https://www.exploit-db.com/exploits/51931 cve-icon cve-icon
History

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-08T04:57:09.343Z

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

Link: CVE-2024-27686

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2024-27686

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T06:45:03Z

Weaknesses