What is CVE-2026-78308?

CVE-2026-78308 is a critical-severity vulnerability in Deltaww Diaenergie, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-09-24.

How severe is CVE-2026-78308?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Deltaww Diaenergie

CVE-2026-78308

Improper Authentication vulnerability in DIAEnergie allows Authentication Bypass. This issue affects DIAEnergie: before 1.11.00.022.

Vulnerability class: Broken Authentication

Published 2026-09-24 · last modified 2026-09-24.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (25.3th percentile), scored 2026-09-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Deltaww Diaenergie

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

759f5e80-c8e1-4224-bead-956d7b33c98b

Frequently asked questions

What is CVE-2026-78308?: CVE-2026-78308 is a critical-severity vulnerability in Deltaww Diaenergie, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-09-24.
How severe is CVE-2026-78308?: Critical severity. CVSS v3 base score is 9.8 out of 10.