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Vulnerability record · CVE-2017-6444 · published 12 March 2017

CVE-2017-6444: Mikrotik routeros uncontrolled resource consumption vulnerability

Mikrotik · Routeros

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.

7.5 CVSS 3.1 High EPSS 13% · top 3.7% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score, v2 7.8
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 8 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-6444), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.