An issue was discovered in MikroTik RouterOS 6.41.4.

Affected versions

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

• mikrotik routeros6.41.4

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-2026-67277Kernel memory disclosure and denial of service in MikroTik RouterOS btest serviceKEV
  65This 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

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

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

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

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {2  // Left empty for the test environment3}

1val client = OkHttpClient.Builder()2  .certificatePinner(3    CertificatePinner.Builder()4      .add("api.sirius.example", "sha256/…")5      .build()6  ).build()

Attack context

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