Vulnerability-Lookup

CVE-2026-58240 (GCVE-0-2026-58240)

Vulnerability from cvelistv5 – Published: 2026-09-08 00:10 – Updated: 2026-09-08 10:34

Title

Missing Authentication check in SAP NetWeaver (Message Server)

Summary

SAP NetWeaver Message Server does not sufficiently validate the authenticity of internal application server components during registration. An unauthenticated attacker with network access to the affected service could exploit this weakness to register an unauthorized component and potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 09:54 UTC

CWE

CWE-308 - Use of Single-factor Authentication

Assigner

sap mitre root

References

2 references

URL	Tags
https://me.sap.com/notes/3759472
https://url.sap/sapsecuritypatchday

Impacted products

1 product

Vendor	Product	Version	CPE status
SAP_SE	SAP NetWeaver (Message Server)	Affected: KERNEL 9.16 Affected: 9.18 Affected: 9.19 Affected: 9.20	guessed

Show details on NVD website

JSON

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FKIE_CVE-2026-58240

Vulnerability from fkie_nvd - Published: 2026-09-08 01:17 - Updated: 2026-09-08 11:17

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	cna@sap.com	https://me.sap.com/notes/3759472
	cna@sap.com	https://url.sap/sapsecuritypatchday

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "SAP NetWeaver (Message Server)",
          "vendor": "SAP_SE",
          "versions": [
            {
              "status": "affected",
              "version": "KERNEL 9.16"
            },
            {
              "status": "affected",
              "version": "9.18"
            },
            {
              "status": "affected",
              "version": "9.19"
            },
            {
              "status": "affected",
              "version": "9.20"
            }
          ]
        }
      ],
      "source": "cna@sap.com"
    }
  ],
  "cveTags": [],
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    {
      "lang": "en",
      "value": "SAP NetWeaver Message Server does not sufficiently validate the authenticity of internal application server components during registration. An unauthenticated attacker with network access to the affected service could exploit this weakness to register an unauthorized component and potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system."
    }
  ],
  "id": "CVE-2026-58240",
  "lastModified": "2026-09-08T11:17:42.887",
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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GHSA-WCWM-G7VG-PG73

Vulnerability from github – Published: 2026-09-08 03:31 – Updated: 2026-09-08 03:31

Details

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-58240"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-308"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-08T01:17:51Z",
    "severity": "CRITICAL"
  },
  "details": "SAP NetWeaver Message Server does not sufficiently validate the authenticity of internal application server components during registration. An unauthenticated attacker with network access to the affected service could exploit this weakness to register an unauthorized component and potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.",
  "id": "GHSA-wcwm-g7vg-pg73",
  "modified": "2026-09-08T03:31:11Z",
  "published": "2026-09-08T03:31:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58240"
    },
    {
      "type": "WEB",
      "url": "https://me.sap.com/notes/3759472"
    },
    {
      "type": "WEB",
      "url": "https://url.sap/sapsecuritypatchday"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-58240 (GCVE-0-2026-58240)

FKIE_CVE-2026-58240

GHSA-WCWM-G7VG-PG73

Tags

Sightings

Nomenclature