ACTIVELY EXPLOITED
CVE-2026-67277: MikroTik RouterOS Missing Authentication for Critical Function Vulnerability
| Vendor | MikroTik |
|---|---|
| Product | RouterOS |
| Actively exploited | Yes |
| Added to CISA KEV | 10 Sep 2026 |
| CISA federal deadline | 13 Sep 2026 |
| Weakness (CWE) | CWE-306 |
Required action (CISA's text)
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Description (NVD)
MikroTik RouterOS contains a missing authentication for critical function vulnerability which allows kernel memory disclosure and denial of service in the btest service.
SOURCES
Other MikroTik flaws
- CVE-2026-67279: Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability
- CVE-2026-86060: MikroTik RouterOS Improper Neutralization of Argument Delimiters in a Command Vulnerability
- CVE-2018-7445: MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability
- CVE-2018-14847: MikroTik Router OS Directory Traversal Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.