What’s Vulnerable › Vulnerabilities

CVE-2020-5726

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-03-30 · updated 2026-06-17
• Weakness: CWE-89

Description

The 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 can invoke the challenge action with a crafted username and discover user passwords.

Affected products

• Grandstream Ucm6202 Firmware: before 1.0.20.22 — fixed in 1.0.20.22
• Grandstream Ucm6204 Firmware: before 1.0.20.22 — fixed in 1.0.20.22
• Grandstream Ucm6208 Firmware: before 1.0.20.22 — fixed in 1.0.20.22

How to fix

Upgrade to a fixed version: Grandstream Ucm6202 Firmware 1.0.20.22; Grandstream Ucm6204 Firmware 1.0.20.22; Grandstream Ucm6208 Firmware 1.0.20.22. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/156977/Grandstream-UCM6200-Series-CTI-Interface-SQL-Injection.html
• https://www.tenable.com/security/research/tra-2020-17
• http://packetstormsecurity.com/files/156977/Grandstream-UCM6200-Series-CTI-Interface-SQL-Injection.html
• https://www.tenable.com/security/research/tra-2020-17

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