Kernel memory disclosure and denial of service in MikroTik RouterOS btest service

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• mikrotik routeros6.0 and later · before 6.49.21
• mikrotik routeros7.0 and later · before 7.23.4
• mikrotik routeros7.24 and later · before 7.24.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (CERT-PL). Independent of NVD's CPE analysis and usually ahead of it.

• Mikrotik RouterOS

  • 7.24 and later · before 7.24.2affected
  • 7.0.0 and later · before 7.23.4affected
  • 6.0.0 and later · before 6.49.21affected

Other highest-scoring records for the same primary product.

• CVE-2018-14847MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write aKEV
  95Now
• CVE-2018-7445A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages.KEV
  87Now
• CVE-2026-86060SSH session privilege manipulation via a crafted username in Mikrotik RouterOSKEV
  67This week
• CVE-2026-67279SSH Pre-Authentication Rekey State Bypass in MikroTik RouterOSKEV
  57Plan
• CVE-2017-20149The Mikrotik RouterOS web server allows memory corruption in releases before Stable 6.38.5 and Long-term 6.37.5, aka Chimay-Red.
  40Plan
• CVE-2022-45315Mikrotik RouterOs before stable v7.6 was discovered to contain an out-of-bounds read in the snmp process.
  39Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1// Added for the support team2app.post("/maintenance/reset", resetDevice);

1if (config.maintenanceEnabled) {2  app.post(3    "/maintenance/reset",4    requireSession, requireRole("admin"), resetDevice5  );6}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.