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CVE-2026-86060 is an argument-injection vulnerability in the MikroTik RouterOS SSH login path. The login helper improperly handles a username beginning with a prohibited character, allowing attacker-controlled input to alter the trusted RouterOS policy mask associated with the SSH authentication session. The altered policy mask can cause the session to receive elevated, including full administrative, privileges.
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A MikroTik RouterOS SSH-login privilege-escalation flaw caused by improper argument handling. A crafted username beginning with a prohibited character enables command-line argument injection that changes the RouterOS policy mask and elevates an unauthorized session to full administrative privileges. It is chained with CVE-2026-67276 in MikroTrick attacks.
One of several vulnerabilities in MikroTik RouterOS. The vulnerabilities are reported as actively exploited; a combination of two enables complete device compromise over SSH.
Vulnerabilità critica di escalation dei privilegi in MikroTik RouterOS causata dalla gestione inadeguata di nomi utente che iniziano con caratteri non consentiti durante l'autenticazione SSH. Un attaccante remoto può usare un nome utente appositamente creato per manipolare le policy di sessione e aumentare i propri privilegi.
A MikroTik RouterOS SSH session privilege-escalation vulnerability. In the actively exploited MikroTrick chain, it is paired with CVE-2026-67276 to obtain full administrator control of exposed RouterOS devices.
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Cross-references every affected SKU, including bundled OEM variants.
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