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PeopleSoft Global Payroll EUVDEUVD-2026-106610

| CVE-2026-91356 MEDIUM
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-rmjf-m78g-v24x
4.2
CVSS 3.1 · Vendor: oracle
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain high-privileged logon to PeopleSoft host
  2. Exploit
    Exploit Global Payroll Switzerland component flaw
  3. Execution
    Perform unauthorized read/insert/update/delete on payroll data
  4. Impact
    Cause partial denial of service

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the attacker to already have high-privileged logon access (PR:H) to the server infrastructure on which PeopleSoft Enterprise HCM Global Payroll for Switzerland 9.2 executes; it is a local vulnerability (AV:L) with no remote network path and no user interaction. Only version 9.2 of the Global Payroll for Switzerland component is affected. The key limiting factors are the need for pre-existing high privileges on the host and the local-only attack vector, which together restrict realistic exploitation to malicious insiders or attackers who have already achieved privileged compromise, sharply narrowing the exposed population beyond the raw CVSS score.

Impact

This is a genuinely low-priority vulnerability despite affecting an enterprise Oracle product. The CVSS 3.1 base score of 4.2 (Medium) is driven down by three strong mitigating metrics in the vendor-provided vector (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L): the attack vector is Local (AV:L), requiring the attacker to already have logon access to the infrastructure where the product executes, and High privileges (PR:H) are required before exploitation. Impacts are all Low (C:L/I:L/A:L) and scope is Unchanged (S:U), meaning the attacker gains only partial read, partial write, and partial denial-of-service against data already within reach of a privileged user. No EPSS score, CISA KEV listing, or public proof-of-concept is present in the supplied data, and SSVC decision data was not provided - all consistent exploitation signals point to no active exploitation. The combination of local access plus pre-existing high privilege makes this far more a post-compromise or malicious-insider concern than an externally reachable threat; the realistic marginal impact is limited because an attacker who already holds high privileges on the host can typically affect the data by other means. No signals conflict: the low CVSS, absence of KEV/POC/EPSS, and the local+privileged prerequisites all agree this is a low real-world priority to patch within a normal quarterly cycle.

Exploit ScenarioDerived

An attacker who already possesses high-privilege logon access to the server infrastructure running PeopleSoft HCM Global Payroll for Switzerland 9.2 (for example a rogue administrator or an attacker who has already compromised a privileged account) leverages the flaw to make unauthorized inserts, updates, or deletes to a subset of payroll data, read a subset of otherwise-restricted data, and cause a partial denial of service. No public exploit code is identified at time of analysis, and because exploitation requires local access with high privileges (AV:L/PR:H), it cannot be performed remotely or by an unprivileged user.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Unauthorized data modification, limited data disclosure and partial denial of service in Oracle PeopleSoft Enterprise HCM Global Payroll Switzerland 9.2 require an attacker who already holds high-privileged logon access to the infrastructure where the component executes. The CVSS 3.1 score of 4.2 (AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L) reflects a local-only attack path with no user interaction and no unauthenticated or remote vector, so the realistic threat actor is a malicious insider or someone who has already achieved privileged compromise on the application or process-scheduler host. No public exploit code has been identified and the issue is not listed in CISA KEV at time of analysis, which keeps operational priority low.

RemediationAI

Patch available per vendor advisory: apply the October 2026 Oracle Critical Patch Update (https://www.oracle.com/security-alerts/cpuoct2026.html), which covers CVE-2026-91356 for PeopleSoft Enterprise HCM Global Payroll Switzerland 9.2 - treat the CPU as the authoritative source for the exact patch/PeopleTools bundle level and test it in a payroll regression environment before production rollout, since Swiss payroll accumulators and statutory reports are sensitive to code changes. Because the vector is AV:L/PR:H, the most effective compensating controls are access-reduction measures: cut down the population holding interactive OS logon to the PeopleSoft application server and Process Scheduler hosts to named administrators only, and remove shared or service accounts used for interactive login (trade-off: tighter host access slows routine support and batch troubleshooting). Enforce least privilege in PeopleTools by reviewing role and permission-list assignments to the Global Payroll Switzerland pages and processes, since the attack presumes an already highly privileged account (trade-off: over-restriction can block legitimate payroll runs). Enable PeopleSoft Audit and database-level auditing on payroll tables and on changes to permission lists, and alert on out-of-band inserts or updates to payroll records and on abnormal termination of payroll batch processes (trade-off: increased audit volume and storage). If patching must be deferred, isolate the Swiss payroll application and Process Scheduler hosts on a restricted management network segment with no general user access, and monitor privileged sessions until the CPU is applied.

Affected VersionsENISA

PeopleSoft Enterprise HCM Global Payroll Switzerland 9.2

Affected Packages

euvd peoplesoft_enterprise_hcm_global_payroll_switzerland no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

PeopleSoft Enterprise HCM is a multi-tier Oracle application built on PeopleTools, typically composed of a web/portal tier, Tuxedo-based application server domains, a Process Scheduler that dispatches batch COBOL/SQR/AE programs, and an Oracle Database back end. 'Global Payroll for Switzerland' is a country extension that layers Swiss payroll regulatory logic, absence/accumulator rules and statutory reporting on top of the core Global Payroll engine, and its delivered pages, AE programs and batch processes run inside that server-side infrastructure. The CVSS vector AV:L with PR:H is unusual for a PeopleSoft web-facing issue and places the practical attack surface on the server itself: an operator who can already log on to the host (OS account, database session, or a highly privileged PeopleTools account) can exercise the flawed logic directly rather than through an anonymous web request. Oracle did not publish a CWE mapping, so the root-cause class is undisclosed, but the tri-partite C:L/I:L/A:L impact profile is consistent with missing or insufficient authorization/validation checks in the Swiss payroll component that let a privileged local user read a subset of payroll data, insert or alter records, and degrade process availability. Because the component handles salary and statutory payroll data, even 'low' confidentiality and integrity ratings map to sensitive financial and personal records.

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Severity by source

Vendor (oracle) PRIMARY 4.2 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
vuln.today AI 4.2 MEDIUM

Description states a high-privileged attacker with local logon (AV:L, PR:H), no user interaction, yielding partial confidentiality, integrity, and availability impact (all Low).

3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
4.0 AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

DescriptionCVE.org

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).

Threat Intelligence Overview

EPSS Score
0.1%
Top 97% exploitable
Prevalence
Low
country-specific PeopleSoft payroll localization module, narrow deployment
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

21
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +21
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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