CVE-2020-5756

Name: CVE-2020-5756
Creator: NVD / NIST
Published: 2020-07-17T21:15:13.607+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.47%

Last modified Jun 17, 2026

CVE-2020-5756 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.. EPSS estimates a 2.47% chance of exploitation in the next 30 days.

Description

Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.47%

82.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Grandstream	Gwn7000 Firmware	<= 1.0.9.4

References

https://www.tenable.com/security/research/tra-2020-41Not Applicable
https://www.tenable.com/cve/CVE-2020-5756Exploit, Third Party Advisory
https://www.tenable.com/security/research/tra-2020-41Not Applicable

Timeline

Published: Jul 17, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5756?

How severe is CVE-2020-5756?

CVE-2020-5756 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.47% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5756?

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-2020-5756?

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

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Source: NVD / NIST