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01 Record

CVE-2026-0857

Use of a Password Hash With Insufficient Computational Effort in Mesalvo MEONA (MEONA Server and MEONA Client) for user accounts whose password was last set under a version before MEONA 2024.10. MEONA

MediumPUBLISHEDCNA: ENISA
CNA base score4.4 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

02 Description

Use of a Password Hash With Insufficient Computational Effort in Mesalvo MEONA (MEONA Server and MEONA Client) for user accounts whose password was last set under a version before MEONA 2024.10. MEONA

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.10% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 1.0% of scored records. A rank, not a probability.
NVD base score
4.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-09-25.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-05-20 10:50Z5 MO AGO
Last updated
2026-09-25 14:23Z1 MO AGO
Reserved
2026-01-12
Assigning CNA
ENISA
Record state
PUBLISHED
Severity
Medium (CVSS 4.4)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Weaknesses
  • CWE-916Use of Password Hash With Insufficient Computational EffortBase
Data version
5.2
Document digest
fe13f3b31b2cbd03d371551cf8e8564ff6fe0b32fa4851d76dd4f7209e01de87

05 Affected products

VendorProductVersionsPlatforms
MesalvoMeona Client2024.10, 2025.04 to < 2025.04.24, 2026.03 to < 2026.03.02—
MesalvoMeona Server2024.10, 2025.04 to < 2025.04.24, 2026.03 to < 2026.03.02—

06 References

07 Remediation

MEONA 2025.04.24 and 2026.03.02 (Q4 2026) remove the legacy password storage methods, require every account whose password is still stored with a legacy method to set a new Argon2-protected password at next logon, and remove the display of stored credential values from the user administration.