MikroTik RouterOS 6.40.5, the SMB service contains a memory corruption vulnerability
Published May 29, 2025
7.5
HIGHCVSS 3.1
EPSS 0.55%
Description
MikroTik RouterOS 6.40.5, the SMB service contains a memory corruption vulnerability. Remote, unauthenticated attackers can exploit this issue by sending specially crafted packets, triggering a null pointer dereference. This leads to a Remote Denial of Service (DoS), rendering the SMB service unavailable.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed May 29, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.55% (0.00552) | 44.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.47% (0.00467) | 36.63th | v5 (v2026.06.15) |
| May 30, 2025 | 0.06% (0.00055) | 17.19th | v4 (v2025.03.14) |
References (1)
- https://github.com/noobone123/RouterOS-issues/blob/main/README.md Third Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/noobone123/RouterOS-issues/blob/main/README.md | Third Party Advisory |
Change history (0)
No recorded changes yet.