CVE-2026-91356 in PeopleSoft Enterprise HCM Global Payroll Switzerland
Summary
by MITRE • 10/21/2026
Vulnerability in the PeopleSoft Enterprise HCM Global Payroll Switzerland product of Oracle PeopleSoft (component: Global Payroll for Switzerland). The supported version that is affected is 9.2. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where PeopleSoft Enterprise HCM Global Payroll Switzerland executes to compromise PeopleSoft Enterprise HCM Global Payroll Switzerland. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of PeopleSoft Enterprise HCM Global Payroll Switzerland accessible data as well as unauthorized read access to a subset of PeopleSoft Enterprise HCM Global Payroll Switzerland accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of PeopleSoft Enterprise HCM Global Payroll Switzerland. CVSS 3.1 Base Score 4.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L).
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified in Oracle PeopleSoft Enterprise HCM Global Payroll Switzerland version 9.2 represents a significant security risk within the enterprise resource planning ecosystem, specifically targeting components responsible for payroll processing in Swiss jurisdictions. This flaw is categorized as an easily exploitable issue that requires high privileged attacker access to the infrastructure hosting the application. The core technical nature of this vulnerability aligns with CWE-78 Improper Neutralization of Special Elements used in an OS Command or similar injection flaws, although it manifests through unauthorized data manipulation rather than direct command execution. An attacker who has already gained authenticated access with elevated privileges can exploit this weakness to bypass intended security controls, leading to a compromise of the system's integrity and confidentiality. The requirement for high privilege suggests that while the initial foothold is difficult to obtain without prior authentication or infrastructure compromise, the subsequent exploitation path offers substantial rewards in terms of data control and service disruption.
From an operational perspective, the impact of this vulnerability extends across multiple axes of the CIA triad: Confidentiality, Integrity, and Availability. The ability to perform unauthorized updates, inserts, or deletions indicates a severe breach of data integrity, allowing malicious actors to alter payroll records, employee information, or financial transactions without detection. This level of access could facilitate fraud, embezzlement, or sabotage within the organization's human resources infrastructure. Furthermore, the vulnerability grants unauthorized read access to a subset of accessible data, posing risks related to privacy violations and potential exposure of sensitive personal identifiable information (PII) protected under regulations such as GDPR or Swiss FADP. The partial denial of service capability adds another layer of risk, potentially disrupting critical payroll operations during essential processing windows, thereby impacting business continuity and employee trust.
The CVSS 3.1 base score of 4.2 reflects a medium severity rating, driven by the Local Attack Vector (AV:L) which necessitates physical or network proximity to the target system, combined with Low Complexity (AC:L) that makes exploitation straightforward once access is gained. The requirement for High Privileges (PR:H) acts as a mitigating factor in terms of initial attack surface but does not eliminate the risk given insider threats or compromised administrative accounts. In terms of MITRE ATT&CK mapping, this vulnerability facilitates techniques associated with Data Manipulation and potentially Credential Access if the exploitation leads to further privilege escalation. The lack of user interaction (UI:N) means that once an attacker has sufficient privileges on the host infrastructure, they can trigger the flaw automatically without needing to deceive a human operator into clicking malicious links or opening files.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. Oracle should be consulted for the latest security patches addressing this specific component in version 9.2, as applying vendor-provided updates is the most effective way to close the code-level flaw. In addition to patching, organizations should enforce strict least-privilege principles across all infrastructure components hosting PeopleSoft applications. Administrative accounts and service accounts running with high privileges must be closely monitored for anomalous behavior using robust logging and intrusion detection systems. Network segmentation plays a critical role in limiting lateral movement; ensuring that the database and application servers are isolated from general corporate networks can reduce the risk of an attacker gaining the necessary local access to exploit this vulnerability. Regular audits of user permissions and review of system logs for unauthorized data modifications or service disruptions will help detect potential exploitation attempts early, minimizing the window of exposure and impact on organizational operations.