CVE-2017-5544

Name: CVE-2017-5544
Creator: NVD / NIST
Published: 2017-01-23T07:59:00.547+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 5.22%

Last modified Jun 17, 2026

CVE-2017-5544 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. EPSS estimates a 5.22% chance of exploitation in the next 30 days.

Description

An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

5.22%

91.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Fiberhome	Fengine S5800 Firmware	v210r240

References

http://www.nfcwar.comURL Repurposed
http://www.securityfocus.com/bid/95708Third Party Advisory, VDB Entry
http://www.nfcwar.comURL Repurposed
http://www.securityfocus.com/bid/95708Third Party Advisory, VDB Entry

Timeline

Published: Jan 23, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-5544?

How severe is CVE-2017-5544?

CVE-2017-5544 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 5.22% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5544?

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-2017-5544?

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

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Source: NVD / NIST