CVE-2017-6444

Name: CVE-2017-6444
Creator: NVD / NIST
Published: 2017-03-12T05:59:00.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 13.49%

Last modified Jun 17, 2026

CVE-2017-6444 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The MikroTik Router hAP Lite 6.25 has no protection mechanism for unsolicited TCP ACK packets in the case of a fast network connection, which allows remote attackers to cause a denial of service (CPU consumption) by sending many ACK packets. After the attacker stops the exploit, the CPU usage is 100% and the router requires a reboot for normal operation.. EPSS estimates a 13.49% chance of exploitation in the next 30 days.

Description

The MikroTik Router hAP Lite 6.25 has no protection mechanism for unsolicited TCP ACK packets in the case of a fast network connection, which allows remote attackers to cause a denial of service (CPU consumption) by sending many ACK packets. After the attacker stops the exploit, the CPU usage is 100% and the router requires a reboot for normal operation.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

13.49%

96.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Mikrotik	Routeros	6.25

References

http://www.exploitalert.com/view-details.html?id=26137Exploit, Third Party Advisory
https://cxsecurity.com/issue/WLB-2017030029Exploit, Third Party Advisory
https://packetstormsecurity.com/files/141449/Mikrotik-Hap-Lite-6.25-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/41601/Exploit, Third Party Advisory, VDB Entry
http://www.exploitalert.com/view-details.html?id=26137Exploit, Third Party Advisory
https://cxsecurity.com/issue/WLB-2017030029Exploit, Third Party Advisory
https://packetstormsecurity.com/files/141449/Mikrotik-Hap-Lite-6.25-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/41601/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Mar 12, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6444?

How severe is CVE-2017-6444?

CVE-2017-6444 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 13.49% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6444?

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-2017-6444?

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

Scan your code now

Source: NVD / NIST