Mikrotik Routeros Authentication Bypass Vulnerability __top__ Review

CVE-2025-10948: MikroTik RouterOS Buffer Overflow Flaw - SentinelOne

/system package update check-for-updates /system package update download-and-install Use code with caution. Step 2: Restrict Management Services

Under specific conditions, sending highly customized HTTP headers allowed malicious actors to fool the web server into associating their unauthenticated request with an active, authenticated administrator session. mikrotik routeros authentication bypass vulnerability

The most significant vulnerability is , which received the highest possible CVSS score of 10.0 (Critical) . This issue is not a complex bug but rather a severe design flaw rooted in how the WebFig management interface is initialized by default.

In some firmware versions, the authentication process handles multi-step handshakes incorrectly. By skipping specific steps or sending a precise sequence of unexpected commands, an attacker can trick the system into believing a session is already fully authenticated. This issue is not a complex bug but

Turn off services you do not actively use, such as FTP, Telnet, or unencrypted HTTP.

Attackers craft specific, malformed packets sent to the Winbox or Webfig ports. If the software fails to properly sanitize the input, the attacker can read arbitrary files—such as the user database file ( list )—allowing them to extract encrypted or plaintext administrative credentials. Turn off services you do not actively use,

/log print where topics~"login|webfig|winbox" and message~"authenticated"

Authentication bypass vulnerabilities in network appliances typically stem from logical flaws in how incoming requests are validated. In MikroTik RouterOS, historical and modern bypass vulnerabilities often target specific management interfaces, such as:

Turn off SCEP, Hotspot, and unused VXLAN configurations if not strictly required. Conclusion