Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-25602
Mesalvo Meona Server — Insufficient Verification of Data Authenticity in the feedback function of Mesalvo MEONA (MEONA Client and MEONA Server).
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L H N U N L N 2.3 .0009 0.5 —
AFFECTED
Product Versions Fixed
Meona Server 2024.10 – —
Meona Client 2024.10 – —
TIMELINE
Feb 3 Reserved by ENISA
May 20 Published (CNA: ENISA)
Sep 25 RESCORED — CVE-2026-25602 (Mesalvo Meona Server). CVSS 4.4 → 2.3 (NVD).
Description
Insufficient Verification of Data Authenticity in the feedback function of Mesalvo MEONA (MEONA Client and MEONA Server). The MEONA Client transmits the recipient address of a feedback report to the MEONA Server, and the server sends the report to the transmitted address instead of the address configured on the server. The feedback function is available only in the MEONA administration area, which requires one of the administrative roles ADMINISTRATOR, SUPERADMINISTRATOR or TYPIST (catalogue editing), or the PHARMACIST role holding the PHARMACY_ADMINISTRATOR right, assigned explicitly by the operating hospital's administrators. Such a user who modifies the client request can cause the MEONA Server to send a message with content of the user's choosing, from the sender address configured on the server, to a recipient of the user's choosing, within the limits permitted by the operator's mail relay. The message can be used for social engineering because it appears to originate from an internal hospital system.
Exploitation requires a MEONA account with one of the administrative roles named above and access to the operating hospital's internal network; MEONA is operated exclusively within closed hospital networks without exposure to the public Internet, and where a hospital permits remote access to that network at all, it is only through the hospital's own remote-access infrastructure (e.g. VPN) under the hospital's control. The message contains only the recipient, subject and text entered by the user; no data of other users or patients is disclosed. Mesalvo is not aware of any exploitation outside the reported security test.
This issue affects MEONA Client and MEONA Server in versions 2024.10, 2025.04 (before 2025.04.24) and 2026.03 (before 2026.03.02). MEONA 2025.04.24 and 2026.03.02 (planned Q4 2026) enforce the configured recipient address on the server. Operators can restrict at their mail relay which recipients the MEONA sender address may reach.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| February 3, 2026 | Reserved | Reserved by ENISA |
| May 20, 2026 | Published | Published (CNA: ENISA) |
| September 25, 2026 | RESCORED | RESCORED — CVE-2026-25602 (Mesalvo Meona Server). CVSS 4.4 → 2.3 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Mesalvo | Meona Server | — | 2024.10 | — |
| Mesalvo | Meona Client | — | 2024.10 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-25602 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
