CVE-2026-56719CWE-125

CVE-2026-56719

Medium · published September 16, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
32.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CVSS v4.0
6.3 · 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
EPSS
0.00393 · 32.3th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-09-16T18:17Z
References (2)
https://forum.mikrotik.com/t/7-24-stable-is-released/272381 · [email protected]https://www.vulncheck.com/advisories/mikrotik-routeros-out-of-bounds-read-via-smb1-sessionsetupandx · [email protected]
EPSS history
Timeline
  • 18 SEP 04:00Z
    EPSS moved — → 0%
    epss
  • 16 SEP 13:07Z
    MikroTik RouterOS < 7.24 Out-of-Bounds Read via SMB1 SessionSetupAndX
    cvelistv5