How severe is CVE-2017-17538?

CVE-2017-17538 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-2017-17538 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-17538?

CVE-2017-17538 affects Mikrotik Router Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-17538?

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-2017-17538 published?

CVE-2017-17538 was published on 2017-12-13 and last updated on 2026-06-17.

CVE-2017-17538

CVE-2017-17538 is a high-severity vulnerability in Mikrotik Router Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mikrotik Router Firmware
Published: 2017-12-13
Last modified: 2026-06-17

Description

MikroTik v6.40.5 devices allow remote attackers to cause a denial of service via a flood of ICMP packets.

Frequently asked questions

What is CVE-2017-17538?: MikroTik v6.40.5 devices allow remote attackers to cause a denial of service via a flood of ICMP packets.
How severe is CVE-2017-17538?: CVE-2017-17538 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-2017-17538 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-17538?: CVE-2017-17538 affects Mikrotik Router Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-17538?: 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-2017-17538 published?: CVE-2017-17538 was published on 2017-12-13 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/43317/

Affected products (1)

cpe:2.3:o:mikrotik:router_firmware:6.40.5:*:*:*:*:*:*:*

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