Oracle Hospitality OPERA 5 5.6.19.23/5.6.25.17/5.6.26.10/5.6.27.4 Opera Servlet Remote Code Execution

Summaryinfo

A vulnerability labeled as critical has been found in Oracle Hospitality OPERA 5 5.6.19.23/5.6.25.17/5.6.26.10/5.6.27.4. This affects an unknown part of the component Opera Servlet. Executing a manipulation can lead to Remote Code Execution. This vulnerability appears as CVE-2026-21967. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Oracle Hospitality OPERA 5 5.6.19.23/5.6.25.17/5.6.26.10/5.6.27.4 and classified as critical. This vulnerability affects an unknown part of the component Opera Servlet. The manipulation with an unknown input leads to a remote code execution vulnerability. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Vulnerability in the Oracle Hospitality OPERA 5 product of Oracle Hospitality Applications (component: Opera Servlet). 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 vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Hospitality OPERA 5 accessible data as well as unauthorized update, insert or delete access to some of Oracle Hospitality OPERA 5 accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Hospitality OPERA 5. CVSS 3.1 Base Score 8.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).

The advisory is available at oracle.com. This vulnerability was named CVE-2026-21967 since 01/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/21/2026).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-3545). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Hospitality Software

Vendor

• Oracle

Name

• Hospitality OPERA 5

Version

• 5.6.19.23
• 5.6.25.17
• 5.6.26.10
• 5.6.27.4

License

• commercial

Website

• Vendor: https://www.oracle.com

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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