What is CVE-2026-21966?

CVE-2026-21966 is a medium-severity vulnerability in Oracle Hospitality_opera_5. CVSS score: 6.1/10. Published 2026-01-20.

How severe is CVE-2026-21966?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Oracle Hospitality_opera_5

CVE-2026-21966

Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera). Supported versions that are affected are 5.6.19.23, 5.6.25.17, 5.6.26.10 and 5.6.27.4. Easily exploitable vu…

EPSS: 0.002 (7.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Oracle Hospitality_opera_5 — versions 5.6.19.23, 5.6.25.17, 5.6.26.10
Oracle Corporation Hospitality Opera 5 Property Services — versions 5.6.19.23, 5.6.25.17, 5.6.26.10

References

secalert_us@oracle.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-21966?: CVE-2026-21966 is a medium-severity vulnerability in Oracle Hospitality_opera_5. CVSS score: 6.1/10. Published 2026-01-20.
How severe is CVE-2026-21966?: Medium severity. CVSS v3 base score is 6.1 out of 10.