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9.8

Oracle Hospitality OPERA 5 Property Services can be taken over remotely

CVE-2026-34311 · published 5 months ago
Summary

Some versions of Oracle Hospitality OPERA 5 Property Services have a security weakness that allows hackers to access and control the system without a password. This means they can potentially steal sensitive information, disrupt operations, or even lock out legitimate users. Oracle Hospitality recommends updating to the latest version to fix this issue.

Original advisory text
Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera). Supported versions that are affected are 5.6.19.24, 5.6.22, 5.6.25....
Vulnerability in the Oracle Hospitality OPERA 5 Property Services product of Oracle Hospitality Applications (component: Opera). Supported versions that are affected are 5.6.19.24, 5.6.22, 5.6.25.19, 5.6.27.6 and 5.6.28. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5 Property Services. Successful attacks of this vulnerability can result in takeover of Oracle Hospitality OPERA 5 Property Services. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker full control
Severity
9.8 Critical
Exploitation
<1% chance of attack within 30 days
Timeline
Published28 May 2026
Updated4 Nov 2026
First seen28 May 2026
Sources
CVE-2026-34311 · NVD
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