PT-2026-42139 · Mesalvo · Meona Client Launcher+1

Published 2026-05-20 · Updated 2026-05-20 · CVE-2026-0856

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Meona Client Launcher Component versions prior to 19.06.2020 15:11:49 Meona Server Component versions prior to 2025.04 5+323020

Description Improper Access Control in the Mesalvo Meona Client Launcher Component and Mesalvo Meona Server Component allows a standard user to gain unauthorized access to the admin panel.

Recommendations Update Meona Client Launcher Component to a version released after 19.06.2020 15:11:49. Update Meona Server Component to a version released after 2025.04 5+323020.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-0856

Affected Products

Meona Client Launcher

Meona Server

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-0856 · Security Note
• https://t.me/CVEtracker/54379 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2057152483844030911 · Twitter Post
• https://seccore.at/blog/cves-meona · Note