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The vulnerability known as “Chimay Red”, a bug that affects MikroTik RouterOS firmware 6.38.4 and earlier. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system. The exploit abuses a multithreaded remote stack collision vulnerability due to an implementation error.


As MikroTik points out, the “Chimay Red” vulnerability was fixed, when the company released RouterOS firmware version 6.38.5. Please update your firmware.



The vulnerability was originally discovered and exploited by the CIA “Engineering Development Group”. The exploit was discovered during the “Vault 7” leak via WikiLeaks in March of 2017.