CVE-2026-0856
Possible ATT&CK Techniques 1AI
T1078 · Valid AccountsAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mesalvo | Meona Client Launcher Component | ≤ 19.06.2020 15:11:49 | affected |
| Mesalvo | Meona Server Component | ≤ 2025.04 5+323020 | affected |
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I. Basic Information for CVE-2026-0856
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
Improper Access Control vulnerability in Mesalvo Meona Client Launcher Component, Mesalvo Meona Server Component enables a normal user gaining access to the admin panel. This issue affects Meona Client Launcher Component: through 19.06.2020 15:11:49; Meona Server Component: through 2025.04 5+323020.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mesalvo | Meona Client Launcher Component | 0 ~ 19.06.2020 15:11:49 | - | |
| Mesalvo | Meona Server Component | 0 ~ 2025.04 5+323020 | - |
II. Public POCs for CVE-2026-0856
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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- https://seccore.at/blog/cves-meona/third-party-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-0856
Same Patch Batch · Mesalvo · 2026-05-20 · 5 CVEs total
| CVE-2026-22314 | 9.0 CRITICAL | Meona Client/Server代码注入漏洞（<=19.06.2020/2025.04） |
| CVE-2026-22315 | 7.2 HIGH | Meona客户端及服务端越权漏洞（通过20.06及25.04） |
| CVE-2026-0857 | 6.0 MEDIUM | Meona客户端及服务器组件内存敏感信息明文存储漏洞 |
| CVE-2026-25602 | 4.4 MEDIUM | Mesalvo Meona组件数据验证不足漏洞 |
IV. Related Vulnerabilities
Same weakness: CWE-284
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MantisBT allows unauthorized users to upload attachments to - CVE-2026-34390
MantisBT: Privilege Escalation from Manager to Administrator - CVE-2026-34358
CtrlPanel: Missing Authorization on Admin Write Endpoints Al
V. Comments for CVE-2026-0856
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