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SAP NetWeaver AS Java EUVD-2026-35279

| CVE-2026-40128 CRITICAL
Path Traversal: '.../...//' (CWE-35)
2026-06-09 cna@sap.com GHSA-xgpc-r53m-pqc6
9.0
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jun 09, 2026 - 01:31 vuln.today
CVE Published
Jun 09, 2026 - 01:16 nvd
CRITICAL 9.0

DescriptionNVD

SAP NetWeaver Application Server Java (Web Container) allows an unauthenticated attacker to craft a malicious HTTP logon request that manipulates file inclusion parameters, enabling path traversal and processing of the included file. Processing the included file could allow the attacker to view or modify sensitive information or render any part of the local system unavailable.

AnalysisAI

Path traversal in SAP NetWeaver Application Server Java's Web Container allows unauthenticated remote attackers to manipulate file inclusion parameters within crafted HTTP logon requests, leading to inclusion and processing of arbitrary local files. Successful exploitation can expose or modify sensitive data and render portions of the server unavailable, with no public exploit identified at time of analysis but a CVSS of 9.0 reflecting full CIA impact with scope change.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed AS Java logon endpoint
Delivery
Craft HTTP logon request with traversal in file-include parameter
Exploit
Web Container resolves manipulated path
Execution
Server processes included local file
Impact
Disclose, modify, or destroy targeted resource

Vulnerability AssessmentAI

Exploitation Exploitation requires HTTP/HTTPS network reachability to the SAP NetWeaver AS Java Web Container logon endpoint and the ability to submit a crafted logon request containing manipulated file inclusion parameters - no credentials and no user interaction are required (PR:N, UI:N). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H yields 9.0 - unauthenticated, network-reachable, with scope change and full CIA impact, partially offset by High attack complexity (AC:H) which implies non-trivial conditions such as specific request shaping or timing. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated attacker on the network reachable to the AS Java HTTP port sends a specifically crafted logon HTTP request whose file inclusion parameter contains traversal sequences pointing to a server-side resource (e.g., a configuration file or a controlled script-like asset). The Web Container resolves the manipulated path and processes the included file, allowing the attacker to disclose sensitive data such as credentials or secure store entries, tamper with included content, or trigger a fault that takes the logon path offline; no public exploit is identified at time of analysis, and the High attack complexity suggests non-trivial request shaping is required.
Remediation Patch available per vendor advisory - apply the fix delivered in SAP Security Note 3727078 (https://me.sap.com/notes/3727078) at the next maintenance window, cross-referenced via the SAP Security Patch Day portal at https://url.sap/sapsecuritypatchday for the corresponding Support Package or kernel patch matching your NetWeaver AS Java release. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

24 hours: Identify and inventory all SAP NetWeaver Application Server Java instances; determine network reachability and business criticality; brief SAP administrators and security leadership. …

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EUVD-2026-35279 vulnerability details – vuln.today

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