CVE-2017-8338

Name: CVE-2017-8338
Creator: NVD / NIST
Published: 2017-05-18T06:29:00.293+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.21%

Last modified Jun 17, 2026

CVE-2017-8338 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 4.21% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

4.21%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Mikrotik	Routeros	6.38.5

References

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

Timeline

Published: May 18, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-8338?

How severe is CVE-2017-8338?

Severity scoring for CVE-2017-8338 is pending analysis. The EPSS model estimates a 4.21% probability of exploitation in the next 30 days.

How do I fix CVE-2017-8338?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-8338?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST