HOMEVULNERABILITIESCVE-2017-8338
HIGH

CVE-2017-8338

CWE-400Published: May 18, 2017· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-8338 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

mikrotik1 product(s)
routeros
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (8)

→
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

Quick Facts

CVE IDCVE-2017-8338
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
Affected1 vendor(s)
PublishedMay 18, 2017

Related CVEs (CWE-400)

CVE-2018-16486
9.8
CVE-2015-4412
9.8
CVE-2017-9119
9.8
CVE-2022-48716
9.8
CVE-2017-1000378
9.8
CVE-2018-16489
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-8338 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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