CVE-2026-56719 (GCVE-0-2026-56719)

Vulnerability from cvelistv5 – Published: 2026-09-16 13:07 – Updated: 2026-10-01 15:20
VLAI
Title
MikroTik RouterOS < 7.24 Out-of-Bounds Read via SMB1 SessionSetupAndX
Summary
MikroTik RouterOS before 7.24 contains an out-of-bounds read vulnerability in the userspace SMB daemon that allows unauthenticated attackers to read beyond the end of the request buffer by supplying a crafted uniPwdLen field value in a minimal SMB1 SessionSetupAndX frame. The out-of-bounds read occurs in the SessionSetupAndX handler before any credential validation, potentially exposing sensitive memory contents.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 15:51 UTC
CWE
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6966 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
MikroTik RouterOS Affected: 0 , ≤ 6.49.18 (semver)
Affected: 7.0.0 , ≤ 7.11.2 (semver)
Unaffected: 7.24.0 (semver)
    cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
    cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-17 00:00
Credits
eeee VulnCheck
Show details on NVD website
To clipboard 

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