CVE-2017-8338

7.5 highEPSS 4.2%

High (7.5) in mikrotik routeros. EPSS 4.2% chance of exploitation in the next 30 days.

A vulnerability in MikroTik Version 6.38.5 could allow an unauthenticated remote attacker to exhaust all available CPU via a flood of UDP packets on port 500 (used for L2TP over IPsec), preventing the affected router from accepting new connections; all devices will be disconnected from the router and all logs removed automatically.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 4.2% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2017-05-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mikrotik:routeros

References

http://seclists.org/fulldisclosure/2017/May/59
https://cxsecurity.com/issue/WLB-2017050062
https://packetstormsecurity.com/files/142538/MikroTik-RouterBoard-6.38.5-Denial-Of-Service.html
https://www.vulnerability-lab.com/get_content.php?id=2064
http://seclists.org/fulldisclosure/2017/May/59

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