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Public proof of conceptFix available

CVE-2020-5723

A public proof of concept exists; no exploitation attested.

  • Published2020-03-30
  • Fixed in1.0.20.22
  • WeaknessCWE-312

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-03-3020:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-5723?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-5723?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Grandstream ucm6202 firmwareversion to verify
BranchAffectedFixed in
1.0< 1.0.20.221.0.20.22
Grandstream ucm6204 firmwareversion to verify
BranchAffectedFixed in
1.0< 1.0.20.221.0.20.22
Grandstream ucm6208 firmwareversion to verify
BranchAffectedFixed in
1.0< 1.0.20.221.0.20.22

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Grandstream ucm6202 firmware to 1.0.20.22

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
1 moduleauxiliary/gather/grandstream_ucm62xx_sql_account_guessrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-312known since 2026-10-23
  • NVDweakness (CWE)CWE-312read 2026-10-23
  • FIRST EPSSEPSS score5.9 %2026-11-03
  • Metasploit FrameworkMetasploit modules1known since 2026-11-01

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2020-03-30
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2020-5723?

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.

Is CVE-2020-5723 actively exploited?

Active exploitation of CVE-2020-5723 has not been confirmed. Its EPSS score was 5.9% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-5723?

CVE-2020-5723 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record