What is CVE-2026-27553?

CVE-2026-27553 is a medium-severity vulnerability in Carlo Gavazzi Automation Yl212cei8m1io, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 6.5/10. Published 2026-09-16.

How severe is CVE-2026-27553?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Carlo Gavazzi Automation Yl212cei8m1io

CVE-2026-27553

A low-privileged remote attacker can manipulate the schema path parameter in the /index.php/diagnostics_tab/ajax_diag_table_rows endpoint using a valid user cookie allowing disclosure of all user password hashes.

Published 2026-09-16 · last modified 2026-09-19.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.6th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-497 — Exposure of Sensitive System Information to an Unauthorized Control Sphere

References

Frequently asked questions

What is CVE-2026-27553?: CVE-2026-27553 is a medium-severity vulnerability in Carlo Gavazzi Automation Yl212cei8m1io, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 6.5/10. Published 2026-09-16.
How severe is CVE-2026-27553?: Medium severity. CVSS v3 base score is 6.5 out of 10.