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Servers and applications

CVE-2018-7445

A buffer overflow was found in the MikroTik RouterOS SMB service when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system. The overflow occurs before authentication takes place, so it is possible for an unauthenticated remote attacker to exploit it. All architectures and all devices running…

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 8 Sept 2022.

Severity
Critical 9.8
Published
19 Mar 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
6.41.3
Exploit chance
66% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
MikroTik RouterOSServers and applications · cpe:o:mikrotik:routeros
  • Version 6.42-rc24
  • Version 6.42-rc23
  • Version 6.42-rc20
  • Version 6.42-rc18
All 13 release lines
  • Every version before 6.41.3
  • Version 6.42-rc2
  • Version 6.42-rc5
  • Version 6.42-rc6
  • Version 6.42-rc9
  • Version 6.42-rc11
  • Version 6.42-rc12
  • Version 6.42-rc14
  • Version 6.42-rc15
  • Version 6.42-rc18
  • Version 6.42-rc20
  • Version 6.42-rc23
  • Version 6.42-rc24

Known exploited

CISA name
MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
29 Sept 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-7445
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-7445