CVE-2020-5723

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-03-30 · updated 2026-06-17
Weakness: CWE-312

Description

The UCM6200 series 1.0.20.22 and below stores unencrypted user passwords in an SQLite database. This could allow an attacker to retrieve all passwords and possibly gain elevated privileges.

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

https://www.tenable.com/security/research/tra-2020-17
https://www.tenable.com/security/research/tra-2020-17

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