CVE-2026-0857

Credential disclosure via plaintext password storage

Published May 20, 2026 · Updated May 20, 2026

Cleartext credential storage in Mesalvo Meona Launcher and Server components allows local users to disclose application account passwords. The user administration interface exposes some passwords in plaintext alongside MD5 password hashes that can be recovered offline. High-privileged access is required; recovered credentials support account compromise and lateral movement without directly altering Meona data.

CVSS severity6.0
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext credential storage in Mesalvo Meona Launcher and Server components allows local users to disclose application account passwords. The user administration interface exposes some passwords in plaintext alongside MD5 password hashes that can be recovered offline. High-privileged access is required; recovered credentials support account compromise and lateral movement without directly altering Meona data.

The record

CVE
CVE-2026-0857
Published
May 20, 2026
Updated
May 20, 2026
Vendor
Mesalvo
Product
Meona Client Launcher Component
Classifications
CWE-316, T1555
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record 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=0 <=19.06.2020 15:11:49

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Mesalvo · Meona Client Launcher Componentversion=0 <=19.06.2020 15:11:49
Mesalvo · Meona Server Componentversion=0 <=2025.04 5+323020

Published CVSS scores

6.0ENISACVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-316Cleartext Storage of Sensitive Information in Memory
T1555Credentials from Password Stores

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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