CVE-2020-5722Known exploitationPublic exploitNetwork attack vector

Root command execution via password-recovery SQL injection

Published Mar 23, 2020 · Updated Oct 21, 2025

SQL injection in Grandstream UCM6200 Series before 1.0.19.20 allows remote attackers to execute shell commands as root via HTTP. The sendPasswordEmail action inserts user_name into an SQLite lookup, then passes attacker-controlled data to sendMail.py through popen without neutralizing SQL or shell syntax. No authentication is required; versions before 1.0.19.20 permit root command execution, while versions before 1.0.20.17 permit HTML injection into password-recovery emails.

CVSS severity9.8
Critical
EPSS probability84.41%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Grandstream UCM6200 Series before 1.0.19.20 allows remote attackers to execute shell commands as root via HTTP. The sendPasswordEmail action inserts user_name into an SQLite lookup, then passes attacker-controlled data to sendMail.py through popen without neutralizing SQL or shell syntax. No authentication is required; versions before 1.0.19.20 permit root command execution, while versions before 1.0.20.17 permit HTML injection into password-recovery emails.

The record

CVE
CVE-2020-5722
Published
Mar 23, 2020
Updated
Oct 21, 2025
Vendor
Grandstream Networks
Product
UCM6200 Series
Classifications
CWE-89, T1059.004, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2020CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Before 1.0.20.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grandstream Networks · UCM6200 Seriesversion=Before 1.0.20.17

Published CVSS scores

9.8CVE ProgramCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0TenableAV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1059.004Unix Shell
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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