How severe is CVE-2017-6444?

CVE-2017-6444 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-6444 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-6444?

CVE-2017-6444 affects Mikrotik Routeros. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-6444?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-6444 published?

CVE-2017-6444 was published on 2017-03-12 and last updated on 2026-06-17.

CVE-2017-6444

CVE-2017-6444 is a high-severity vulnerability in Mikrotik Routeros with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Mikrotik Routeros
Published: 2017-03-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2017-6444?: 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.
How severe is CVE-2017-6444?: CVE-2017-6444 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-6444 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-6444?: CVE-2017-6444 affects Mikrotik Routeros. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-6444?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-6444 published?: CVE-2017-6444 was published on 2017-03-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:mikrotik:routeros:6.25:*:*:*:*:*:*:*

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