Skip to content
Heist/ feed
Medium

MikroTik RouterOS < 7.24 Out-of-Bounds Read via SMB1 SessionSetupAndX

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-56719

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-56719

RouterOS

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "MikroTik",
    "product": "RouterOS",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "versionType": "semver",
        "lessThanOrEqual": "6.49.18"
      },
      {
        "status": "affected",
        "version": "7.0.0",
        "versionType": "semver",
        "lessThanOrEqual": "7.11.2"
      },
      {
        "status": "unaffected",
        "version": "7.24.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unknown"
  }
]
Related CVEs
CVE-2026-56719

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#5432 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement