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Vulnerability record · CVE-2020-5759 · published 17 July 2020

CVE-2020-5759: Grandstream ucm6202 firmware os command injection vulnerability

Grandstream · Ucm6202 Firmware

Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via SSH. An authenticated remote attacker can execute commands as the root user by issuing a specially crafted "unset" command.

9.8 CVSS 3.1 Critical EPSS 3.2% · top 12.3% CWE-78 · OS command injection
9.8CVSS 3.1 base score, v2 10.0
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via SSH. An authenticated remote attacker can execute commands as the root user by issuing a specially crafted "unset" command.

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

Affected products

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

References

LinkTags
https://www.tenable.com/security/research/tra-2020-42 Not Applicable
https://www.tenable.com/cve/CVE-2020-5759 Third Party Advisory
https://www.tenable.com/security/research/tra-2020-42 Not Applicable

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Related vulnerabilities

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

9.8CVE-2020-5757Grandstream ucm6202 firmware os command injection vulnerabilityGrandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via HTTP. An authenticated remote attacker can …EPSS 6.9%9.8CVE-2020-5723Grandstream ucm6202 firmware cleartext storage of sensitive data vulnerabilityThe UCM6200 series 1.0.20.22 and below stores unencrypted user passwords in an SQLite database. This could allow an attacker to retrieve all password…EPSS 5.9%8.8CVE-2020-5758Grandstream ucm6202 firmware os command injection vulnerabilityGrandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via HTTP. An authenticated remote attacker can …EPSS 4.4%8.8CVE-2019-10662Grandstream ucm6204 firmware os command injection vulnerabilityGrandstream UCM6204 before 1.0.19.20 devices allow remote authenticated users to execute arbitrary code via shell metacharacters in the backupUCMConf…EPSS 44%8.8CVE-2019-10663Grandstream ucm6204 firmware sql injection vulnerabilityGrandstream UCM6204 before 1.0.19.20 devices allow remote authenticated users to conduct SQL injection attacks via the sord parameter in a listCodebl…EPSS 28%7.5CVE-2020-5724Grandstream ucm6202 firmware sql injection vulnerabilityThe Grandstream UCM6200 series before 1.0.20.22 is vulnerable to an SQL injection via the HTTP server's websockify endpoint. A remote unauthenticated…EPSS 12%7.5CVE-2020-5726Grandstream ucm6202 firmware sql injection vulnerabilityThe Grandstream UCM6200 series before 1.0.20.22 is vulnerable to an SQL injection via the CTI server on port 8888. A remote unauthenticated attacker …EPSS 4.3%5.9CVE-2020-5725Grandstream ucm6202 firmware sql injection vulnerabilityThe Grandstream UCM6200 series before 1.0.20.22 is vulnerable to an SQL injection via the HTTP server's websockify endpoint. A remote unauthenticated…EPSS 1.8%

Source: NIST National Vulnerability Database (record CVE-2020-5759), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.