High [CVE-2024-27686] Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445
This high-severity MikroTik advisory covers CVE-2024-27686 affecting MikroTik RouterOS.
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Summary
The SMB service in RouterOS 6 could be affected by a specially crafted SMB session setup packet. In the reported scenario, this could interrupt the active SMB session, which may also interrupt an ongoing file transfer that depends on that session.
This issue is fixed in RouterOS 6.49.14. RouterOS version 7 is not affected.
MikroTik always recommends keeping RouterOS devices up to date and using a strong firewall so SMB and other device services are not reachable from untrusted networks.
Affected product named by the advisory: MikroTik RouterOS.
- through 6.49.10
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Mitigation checklist
- Upgrade RouterOS to a fixed release: 6.49.14.
- MikroTik always recommends keeping RouterOS devices up to date and using a strong firewall so SMB and other device services are not reachable from untrusted networks.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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