CVE-2026-44763

Executive Summary

CVE-2026-44763 is an insufficient file path validation vulnerability (CWE-22 — Path Traversal) affecting SAP Manufacturing Integration and Intelligence (MII). A privileged attacker can exploit this flaw using specially crafted input to write files outside the intended directory, which may compromise the integrity of other components. The vulnerability requires high privileges, user interaction, and non-trivial attack conditions, yet successful exploitation yields high impact across confidentiality, integrity, and availability (CVSS 7.6). As of this report, no patch is available from any tracked source, and no public exploit code or PoC has been observed.

Technical Analysis

Vulnerability Class: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) — commonly known as Path Traversal.

Affected Component: SAP Manufacturing Integration and Intelligence (SAP MII) — a module within SAP's manufacturing suite that provides real-time integration of manufacturing operations, visibility into plant floor operations, and intelligence capabilities for production planning and execution.

Mechanism: The NVD description indicates the flaw is triggered by "insufficient file path validation in certain functions." In SAP MII, file-related operations are typically exposed through RFC-enabled function modules or web services that handle data exchange between manufacturing systems and SAP backend components. When constructing file paths from user-supplied input, the application fails to properly validate or sanitize path traversal sequences (e.g., ../ or absolute path designations).

Attack Conditions: The described exploitation requires three critical preconditions:

1. Privileged access — The attacker must already hold elevated privileges within the SAP MII system (e.g., a role with access to the affected transaction or service). This is not a remote unauthenticated vulnerability.
2. User interaction — A legitimate user must subsequently access the attacker-influenced content. This suggests a multi-stage attack where the attacker first plants a malicious file path reference and then waits until an authorized user navigates to the affected directory or executes a function that dereferences it.
3. Environmental dependencies — the NVD description notes that successful exploitation "depends on conditions outside the attacker's control," indicating that the precise sequence of directory states, scheduled jobs, or user behaviors must align favorably for the attack to yield impact.

Impact Mechanics: When the insufficient validation is triggered, the application writes files to a location outside the intended directory. Depending on the function exploited, this could allow:

• Overwriting configuration files in other SAP system components (confidentiality + integrity).
• Planting malicious payloads (e.g., JSP/HTML files) in web-accessible directories of related components (integrity).
• Causing service outages by corrupting files required by other components (availability).

The CVSS vector (CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H) confirms this is a network-exploitable vulnerability with high complexity, requiring high privileges, user interaction, and having scope change (the compromised component impacts other components within the SAP landscape).

Technical Detail Note: The NVD description does not disclose specific function names, transaction codes, or URL endpoints. As such, precise technical analysis of the exact vulnerable code path is not possible without vendor disclosure. The analysis above describes the vulnerability at the class level, derived strictly from the official description.

Exploitation Scenarios

Important caveat: No public PoC or exploit code is available as of this report (POC_STATUS: None). The attack chain is inferred from the vulnerability class and the constraints stated in the NVD description.

Scenario 1 — Configuration File Overwrite via SMB/File Share:

1. Reconnaissance/target identification: The attacker identifies SAP MII instances exposed on the network — commonly on ports 50000 (HTTP), 50001 (HTTPS), or RFC gateways (port 3300). They enumerate available privileged user accounts (either through stolen credentials, internal compromise, or abuse of weak authentication).

2. Triggering the flaw: The attacker invokes a privileged MII function that writes files to a directory, passing a path that includes traversal sequences (e.g., ..\..\sys\global\someconfig.xml) as the filename parameter.

3. Payload/execution: Rather than providing a benign relative path, the attacker embeds ../ constructs in the path parameter. The backend constructs a filesystem path that escapes the intended sandbox directory, writing attacker-controlled content into a configuration directory of another SAP component (e.g., a workflow server or NETWEAVER application server).

4. Post-exploitation impact: The attacker-influenced content is now present in a trusted component's configuration. A legitimate administrator subsequently triggers a maintenance task or application restart that reads this configuration. This can result in (a) loss of integrity (malicious configurations), (b) confidentiality (if the attacker can induce the component to reveal data), and (c) availability (if the payload crashes the component).

Scenario 2 — Web Component Defacement/Compromise:

1. Reconnaissance: The attacker maps the SAP MII web interface and identifies adjacent web components deployed on the same application server.

2. Triggering: Using a privileged session, the attacker submits crafted input to a file-writing function where a filename parameter is not validated for absolute paths (e.g., passing C:\inetpub\wwwroot\shell.jsp on Windows or /usr/share/tomcat/webapps/shell.jsp on Linux).

3. Payload: The attacker writes a JSP/JShell payload into the web root.

4. Post-exploitation: When a legitimate user later accesses a URL that renders the application's file listing or invokes a report that references the planted file, the web server executes the malicious content, granting the attacker web shell access or lateral movement capability.

Constraints Realism: Both scenarios depend on conditions "outside the attacker's control" — the exact directory the server uses, the scheduled jobs that reference the written files, and the interaction of a legitimate user. This elevates the practical complexity significantly (reflected in AC:H and UI:R in the CVSS vector).

Impact Assessment

CVSS Subscores (derived from vector CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H):

Business Impact: SAP Manufacturing Integration and Intelligence sits at the core of manufacturing operations — connecting ERP, MES, and shop-floor systems. Successful exploitation could compromise:

• Manufacturing data integrity: production orders, quality inspection results, and material tracking data could be altered.
• Cross-component contamination: Because the scope is "Changed," the impact extends beyond the MII instance — any component on the same application server (e.g., ECC, SCM) may be affected.
• Compliance exposure: Manufacturing records subject to regulatory oversight (e.g., FDA 21 CFR Part 11, ISO 9001) could be tampered with, leading to regulatory penalties.

Affected Systems: The NVD database lists Affected Versions: [], meaning no version range has been verified publicly. SAP MII is typically deployed as part of SAP ME/MII (formerly known as SAP xMII), versions 15.x and 16.x are the most commonly deployed in production landscapes. Without a vendor advisory, we cannot pin the exact affected version range. The unpatched status (patch confidence 0/4) makes this critical for any SAP MII deployment.

Blast radius: Moderate-to-high. The attack requires high privileges and user interaction, which caps the likelihood of mass exploitation; however, the scope change means a single successful exploit could cascade to other SAP components within the same landscape.

Detection Guidance

Sigma Rule

title: SAP MII File Path Traversal Attempt via Privileged Service
id: 59a42c2e-8f9b-4f2c-9d1d-3b7a9bb9f2d1
status: experimental
description: Detects attempts to exploit CVE-2026-44763 - insufficient file path validation in SAP MII allowing file writes outside intended directory
author: Valtersit Threat Intelligence
date: 2026/06/10
logsource:
  product: sap
  service: application_log
detection:
  selection_sap_abap:
    syslog_program:
      - SAPMII*
      - MII*
  selection_file_ops:
    message|contains|all:
      - 'file'
      - 'write'
      - 'path'
  selection_traversal:
    message|contains:
      - '..\\'
      - '../'
      - 'C:\\'
      - '/etc/'
      - '\\windows\\system32'
  selection_rfc_error:
    type: 'ABORT'
    severity:
      - 'A'
      - 'E'
  condition: selection_sap_abap and selection_file_ops and selection_traversal and selection_rfc_error
  timeframe: 5m
falsepositives:
  - Legitimate administrators managing file shares through MII
  - Backup processes that intentionally access paths outside the MII sandbox
level: high
tags:
  - attack.t1190
  - attack.t1059.007
  - cve.2026.44763
  - cwe.22
  - mitre.impact.t1499
fields:
  - EventDescription
  - UserName
  - TransactionCode
  - ErrorCode

YARA Rule

rule SAP_MII_Path_Traversal_CVE_2026_44763
{
    meta:
        author = "Valtersit Threat Intelligence"
        date = "2026-06-10"
        description = "Detects crafted input patterns used to exploit insufficient file path validation in SAP MII"
        cve = "CVE-2026-44763"
        severity = "high"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-44763"
    
    strings:
        // Path traversal sequences commonly used in payloads
        $dotdot_slash = /(?i)(\.\.\\\/){2,}|(\.\.\\\\){2,}/
        $absolute_win = /[a-zA-Z]:[\\\/]{1,2}(windows|program files|inetpub|etc)/
        $absolute_nix = /(\/etc\/|\/usr\/|\/var\/|\/tmp\/)/ 
        $heap_escape = /(\.\.%\2f|\.\.%5c)/
        
        // SAP MII context keywords
        $mii_context = /(?i)(MII_|MWB_|MII\.|ManufacturingIntegration)/
        $file_ops = /(?i)(file_write|create_file|save_file|store_file)/
        
        // Typical log signatures of failed path resolution
        $error_string = /(?i)(invalid path|path not found|file not found|zcx_mii*)/
        
    condition:
        (
            2 of ($dotdot_slash, $absolute_win, $absolute_nix, $heap_escape)
            and any of ($mii_context, $file_ops)
            and filesize < 10KB
        ) or (
            all of them and $error_string
        )
}

Suricata IDS Rule

alert http any any -> any any (
    msg:"ET EXPLOIT SAP MII File Path Traversal Attempt (CVE-2026-44763)";
    flow:established,to_server;
    content:"MII"; nocase; 
    http.uri;
    content:"./"; http.uri;
    sid:202644763;
    rev:1;
    classtype:attempted-admin;
    reference:cve,2026-44763;
    reference:url,nvd.nist.gov/vuln/detail/CVE-2026-44763;
    metadata:
        created_at 2026_06_10,
        updated_at 2026_06_10,
        former_category EXPLOIT,
        attack_target SAP,
        deployment Internet,
        signature_severity Critical,
        tagged CVE-2026-44763;
)

Elastic Detection

any where
  process.name != null and (
    (event.module == "winlogbeat" and winlog.event_id == 4688) or
    (event.module == "system" and event.dataset == "process")
  )
  and wildcard(process.command_line, "*..\\*") and wildcard(process.command_line, "*\\*", "*MII*")
  
  or
  
  any where
    event.dataset == "sap.application_log"
    and wildcard(message, "*MII*")
    and (wildcard(message, "*..\\*") or wildcard(message, "*../*") or wildcard(message, "*:\\*"))
    and (wildcard(message, "*write*") or wildcard(message, "*file*") or wildcard(message, "*save*"))
    and (wildcard(message, "*abort*") or wildcard(message, "*error*") or wildcard(message, "*denied*"))

Splunk SPL Query

index=* sourcetype="sap:applicationlog" OR sourcetype="sap:abap:syslog"
| search "MII" 
        AND ("..\\" OR "../" OR ":/" OR "\\windows" OR "/etc/" OR "\\inetpub")
        AND ("file" OR "write" OR "save" OR "store" OR "open")
        AND (severity="Error" OR severity="Fatal" OR status="ABORT" OR type="*ABEND*")
| rex field=_raw "(?i)(?<trans_code>[A-Z0-9]{3,4})\s*:\s*(?<action>(write|save|create|open)\w*)"
| rex field=_raw "(?i)(?<path_param>[\/\\][A-Za-z0-9_\.\-\/\\:]*?(\.\.)[A-Za-z0-9_\.\-\/\\:]*)"
| table _time, host, source, sourcetype, UserName, trans_code, action, path_param, Message
| sort - _time
| eval suspicious = if(match(path_param, "(\.\.){1}[\\\/]+"), "HIGH", "WATCH")
| where suspicious == "HIGH"
| stats count by host, UserName, trans_code, action, path_param
| where count > 2

Wazuh OSSEC Rule

<group name="sap,">
  <rule id="100660" level="15">
    <if_sid>531</if_sid>
    <match>MII</match>
    <regex>(\.\.\\)|(\.\./)</regex>
    <regex>(file|write|save|store|open)</regex>
    <regex>abort|error|denied|failed</regex>
    <description>SAP MII - Potential path traversal attempt (CVE-2026-44763)</description>
    <group>cve-2026-44763,path_traversal,cwe-22,</group>
    <mitre>
      <id>T1190</id>
    </mitre>
  </rule>
  
  <rule id="100661" level="12">
    <if_sid>100660</if_sid>
    <regex>\.\.</regex>
    <description>SAP MII - Repeated traversal patterns detected - escalation</description>
    <group>cve-2026-44763,path_traversal,cwe-22,</group>
    <mitre>
      <id>T1499</id>
    </mitre>
  </rule>
</group>

Mitigation & Patch Guidance

Patch Status: UNPATCHED — no patch evidence from any tracked source (confidence 0/4). The vendor has not issued a Security Note or emergency patch for this CVE as of this report.

1. Immediate Mitigations (while unpatched)

• Restrict privileged access: Review and eliminate SAP MII user roles that include file manipulation via RFC function modules. Enforce segregation of duties so that fewer users have both file-write privileges and access to other SAP components.
• File system permissions: Configure the SAP MII server's file system so that the directories MII writes to have strict write permissions (read-only for most users, write for a narrowly-scoped service account). Restrict write access to the OS account under which the MII application server runs.
• Network-level controls: Apply egress and ingress firewall rules that restrict access to SAP MII ports to trusted internal subnets only. If the MII instance is exposed to the internet, place it behind a reverse proxy that blocks suspicious URI patterns (e.g., .. sequences).
• Audit and monitoring: Enable SAP security audit log and system-wide file change monitoring. Deploy the Sigma/Splunk/Elastic detections above on the SAP application server logs to detect traversal attempts.
• User awareness: Communicate to SAP MII users the importance of not accessing unknown file links within the application until a patch is available.

2. Patch/Upgrade Steps

• Monitor SAP Support Portal for SAP Security Notes referencing CVE-2026-44763. SAP typically publishes notes via the "SAP Security Patch Day" on the second Tuesday of each month. Subscribe to the SAP Security Patch Day mailing list.
• When the patch is released: Apply the relevant SAP Note using SNOTE transaction. If the note includes an "EHOP" (Early Watch Report) or "ABAP Platform" update, follow the standard transport request procedure.
• If a fix is issued for MII as a separate component (Java-based): Apply the fix using SAP HANA Studio or the Software Update Manager (SUM) procedure specific to MII/ME.

3. Long-Term Hardening

• Upgrade SAP MII to the latest support pack to benefit from cumulative security improvements.
• Enable ABAP Path Check: For custom code that handles file paths, enforce the usage of cl_abap_filename or equivalent ABAP classes that validate and sanitize path parameters. This is a developer-level fix that should be incorporated once the vendor identifies the vulnerable function modules.
• Implement SAP Secure Configuration Baseline for MII — including disabling unused RFC destinations, removing default users, and enabling SSL/TLS on all communication channels.
• Integrate SAP activity monitoring into the enterprise SIEM to provide continuous detection of file-based attacks.
• Periodic penetration testing of the SAP MII instance (including the described attack chain scenarios) to verify the effectiveness of mitigations without a vendor patch.

References

1. NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2026-44763 — Official NVD record with CVSS vector and description.

2. SAP Security Notes Portal: https://support.sap.com/en/my-support/knowledge-base/security-notes.html — Official SAP portal where the pending security note for CVE-2026-44763 is expected to be published. NOTE: No note exists yet for this CVE; this is the portal to monitor.

3. MITRE CWE-22 (Path Traversal): https://cwe.mitre.org/data/definitions/22.html — Reference for the vulnerability class underlying this CVE.

4. SAP Security Patch Day Information: https://security.sap.com/advisories/operations/security-patch-day.html — The monthly release cycle where the fix for this vulnerability is expected to appear.

5. CISA Known Exploited Vulnerabilities Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog — CVE-2026-44763 is not listed (CISA KEV: NO), indicating no confirmed in-the-wild exploitation as of this report.

Report Classification: TLP:GREEN — Limited disclosure, restricted to community.

Report ID: VTR-2026-44763-001

Threat Actor Campaign Evidence: No known threat actor campaigns have been observed exploiting CVE-2026-44763. The EPSS score of 0.00282 places this in the 20.5th percentile — low but non-zero probability of exploitation in the wild within 30 days of this assessment.