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Sap Human Capital Management For Sap S 4Hana CVE-2026-34264

| EUVDEUVD-2026-22174 MEDIUM
Observable Response Discrepancy (CWE-204)
2026-04-14 sap GHSA-4c58-m4cg-6h2f
6.5
CVSS 3.1 · Vendor: sap
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Attack ChainAIDerived

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

  1. Access
    Authenticate with low-privilege HCM user credentials
  2. Delivery
    Submit authorization queries for unauthorized resources
  3. Exploit
    Analyze distinguishing error messages returned
  4. Execution
    Enumerate sensitive data structure through pattern recognition
  5. Impact
    Infer confidential information beyond authorized scope

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V6 - Authentication Response uniformity
Impact

This vulnerability presents a moderate real-world risk profile with conflicting signals. The CVSS score of 6.5 reflects high confidentiality impact (C:H) but requires low-privilege authenticated access (PR:L), which narrows the threat actor pool to internal users or those with valid credentials. The CVSS vector indicates network attack vector (AV:N) with low complexity (AC:L), meaning exploitation is straightforward once an authenticated session exists. However, EPSS data is not provided, limiting probability assessment. The vulnerability does not appear in CISA KEV, suggesting no confirmed active exploitation at time of analysis. Real-world risk depends heavily on organizational context: SAP S/4HANA environments with many low-privilege users (e.g., employees with HR self-service access) face higher risk of sensitive HR data enumeration (salary bands, organizational structures, employee lists). The information disclosure is limited to what can be guessed through message patterns rather than direct system compromise, reducing urgency compared to higher-impact vulnerabilities, but still requiring prompt remediation due to sensitivity of HR data.

Exploit ScenarioDerived

A low-privilege HR employee with SAP HCM access attempts to query employee records outside their department by submitting multiple authorization requests. By observing the specific error messages returned (e.g., 'resource does not exist' versus 'access denied'), the attacker can systematically enumerate and infer the structure and existence of sensitive HR data such as organizational hierarchies, salary bands, or employee lists that they should not be permitted to view. No public exploit code is required; exploitation relies on manual enumeration and message analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 14, 2026

SAP Human Capital Management for SAP S/4HANA allows authenticated users with low privileges to enumerate and guess sensitive information through specific authorization check messages, resulting in information disclosure beyond their authorized scope. The vulnerability affects SAP HCM across affected versions and requires low-privilege authenticated access to exploit, with a CVSS score of 6.5 reflecting high confidentiality impact but no integrity or availability compromise.

RemediationAI

Apply the security patch provided by SAP through their standard patching process referenced in SAP Security Patch Day (https://url.sap/sapsecuritypatchday) and detailed in SAP Note 3680767 (https://me.sap.com/notes/3680767). The patch corrects authorization check message handling to prevent enumeration of protected resources. Organizations should prioritize patching systems with large numbers of low-privilege HCM users (e.g., employee self-service portals). Until patches are deployed, organizations may implement access controls restricting low-privilege user access to resource enumeration features, though this may impact business functionality.

Affected VersionsENISA

SAP Human Capital Management for SAP S/4HANA SAP_HRRXX 600
SAP Human Capital Management for SAP S/4HANA 604
SAP Human Capital Management for SAP S/4HANA 102
SAP Human Capital Management for SAP S/4HANA 608
SAP Human Capital Management for SAP S/4HANA 101
SAP Human Capital Management for SAP S/4HANA S4HCMRXX 100

Affects your stack

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Technical ContextAI · show details

The vulnerability stems from improper information disclosure in authorization checks within SAP Human Capital Management (HCM), a core human resources module of SAP S/4HANA. The root cause is classified as CWE-204 (Observable Discrepancy), indicating that the system returns distinguishable messages or responses during authorization validation that leak information about protected resources. When an authenticated user with low privileges attempts to access or enumerate resources, the system's specific error messages or response patterns allow an attacker to infer the existence and nature of sensitive data they should not have permission to view. This is a classic example of authorization logic that fails to implement proper information hiding, allowing content enumeration through message analysis rather than direct access.

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Severity by source

Vendor (sap) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from Vendor (sap) · only source for this CVE.

CVSS VectorVendor: sap

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

DescriptionCVE.org

During authorization checks in SAP Human Capital Management for SAP S/4HANA, the system returns specific messages. Due to this, an authenticated user with low privileges could guess and enumerate the content shown, beyond their authorized scope. This leads to disclosure of sensitive information causing a high impact on confidentiality, while integrity and availability are unaffected.

Threat Intelligence Overview

EPSS Score
0.0%
Top 91% exploitable
Social Media
1
Sightings
Data Quality
5 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 0.0%
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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