CVE-2026-21967 is a high-severity vulnerability affecting the Oracle Hospitality OPERA 5 product. This vulnerability allows an unauthenticated attacker with network access via HTTP to compromise the system. With a CVSS score of 8.6, it presents significant risks, including unauthorized access to critical data, as well as the ability to perform unauthorized updates, inserts, or deletions of data. Furthermore, this vulnerability can result in partial denial of service (DoS) for the affected product.
Organizations utilizing Oracle Hospitality OPERA 5 must address this vulnerability urgently, as successful exploitation can lead to substantial data breaches and loss of data integrity. It is crucial to prioritize patching of the affected versions, namely 5.6.19.23, 5.6.25.17, 5.6.26.10, and 5.6.27.4.
The vulnerability was published on January 20, 2026, and is classified under the CVSS 3.1 framework with impacts on confidentiality, integrity, and availability. It is vital for organizations to assess their exposure and take immediate action to safeguard their systems against potential threats.
Organizations should also stay informed on the latest threat intelligence and remediation strategies to mitigate risks effectively. Given the potential for unauthorized access and data manipulation, the urgency for defenders cannot be overstated.
Vulnerability Details
This vulnerability allows an unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5. Supported affected versions include 5.6.19.23, 5.6.25.17, 5.6.26.10, and 5.6.27.4. The CVSS score of 8.6 indicates a high severity level with impacts on confidentiality, integrity, and availability.
Technical Analysis
The root cause of this vulnerability is related to insufficient access controls within the OPERA servlet component of the Oracle Hospitality applications. The attack vector is network-based, allowing attackers to exploit it remotely. The attack complexity is low, and no privileges or user interaction are required for successful exploitation.
The potential impacts of exploitation include a high confidentiality impact, as attackers could gain access to sensitive data, a low integrity impact, and a low availability impact, which may allow attackers to cause a partial DoS.
Risk & Impact Analysis
Organizations using affected versions of Oracle Hospitality OPERA 5 face significant risks, including unauthorized access to sensitive customer data and potential regulatory repercussions. The vulnerability's high CVSS score indicates a pressing need for remediation, as the blast radius could affect numerous customers and business operations.
The urgency for organizations is classified as high, necessitating immediate attention to patching and securing their systems to prevent exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of the Oracle Hospitality OPERA 5 product are 5.6.19.23, 5.6.25.17, 5.6.26.10, and 5.6.27.4. Organizations should ensure they are running the latest patched version to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching the affected systems to the latest versions available from Oracle. For those unable to apply the patch immediately, consider implementing network segmentation and access controls to limit exposure to the vulnerability.
For more comprehensive security, organizations can engage in penetration testing to evaluate their security posture.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual access patterns and failed authentication attempts. Behavioral anomalies such as unexpected data access or changes should also be flagged for review.
AppSecure Threat Intelligence Insight
The existence of CVE-2026-21967 highlights a broader trend of vulnerabilities in widely used applications that can be exploited over the network. Security teams must remain vigilant and proactively assess their environments against such threats.
In response to vulnerabilities like this, organizations are encouraged to develop a comprehensive vulnerability management program that includes regular assessments and updates to security protocols.
Additionally, organizations should consider investing in penetration testing methodologies to better understand their exposure and mitigation strategies.
By staying informed and proactive, organizations can significantly reduce their risk profile and enhance their overall security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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