Vulnerability-Lookup

GHSA-2P27-7HCF-MPP3

Vulnerability from github – Published: 2026-08-04 09:31 – Updated: 2026-08-04 09:31

Details

The background service of ABP or AES runs as NT AUTHORITY\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is readable by standard users and protected using DPAPI. Any authenticated local user can recover the key and forge valid IPC requests. Furthermore, the service does not check the identity of the requesting process and validates destination paths using an insufficient substring check. A local attacker can submit crafted encrypted requests containing directory traversal sequences to perform arbitrary file reads and arbitrary file writes as NT AUTHORITY\SYSTEM, leading to full local privilege escalation. Affected products and versions include: ABP (ASUSTOR Backup Plan) 2.0.7.10171 and earlier as well as AES (ASUSTOR EZSync) 1.1.1.3113 and earlier.

Severity

8.5 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-18759"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269",
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-04T08:16:35Z",
    "severity": "HIGH"
  },
  "details": "The background service of ABP or AES runs as NT AUTHORITY\\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is readable by standard users and protected using DPAPI. Any authenticated local user can recover the key and forge valid IPC requests. Furthermore, the service does not check the identity of the requesting process and validates destination paths using an insufficient substring check. A local attacker can submit crafted encrypted requests containing directory traversal sequences to perform arbitrary file reads and arbitrary file writes as NT AUTHORITY\\SYSTEM, leading to full local privilege escalation.\nAffected products and versions include: ABP (ASUSTOR Backup Plan) 2.0.7.10171 and earlier as well as AES (ASUSTOR EZSync) 1.1.1.3113 and earlier.",
  "id": "GHSA-2p27-7hcf-mpp3",
  "modified": "2026-08-04T09:31:35Z",
  "published": "2026-08-04T09:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18759"
    },
    {
      "type": "WEB",
      "url": "https://www.asustor.com/security/security_advisory_detail?id=70"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-18759 (GCVE-0-2026-18759)

Vulnerability from cvelistv5 – Published: 2026-08-04 07:25 – Updated: 2026-08-04 13:33

Title

An improper authentication and path traversal vulnerability exists in ASUSTOR Backup Plan and ASUSTOR EZ Sync.

Summary

Severity

8.5 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-287 - Improper Authentication
CWE-269 - Improper Privilege Management

Assigner

ASUSTOR1

References

1 reference

URL	Tags
https://www.asustor.com/security/security_advisor…	vendor-advisory

Impacted products

2 products

Vendor	Product	Version
ASUSTOR Inc.	ABP	Affected: ABP 2.0 , ≤ 2.0.7.10171 (custom)
ASUSTOR Inc.	AES	Affected: AES 1.0 , ≤ 1.1.1.3113 (custom)

Date Public

2026-08-04 07:25

Credits

Kazuma Matsumoto, Security Researcher at GMO Cybersecurity by IERAE, Inc.

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-18759",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-04T13:25:07.734388Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-04T13:33:51.752Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "platforms": [
            "Windows",
            "x86",
            "64 bit"
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          "vendor": "ASUSTOR Inc.",
          "versions": [
            {
              "lessThanOrEqual": "2.0.7.10171",
              "status": "affected",
              "version": "ABP 2.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows",
            "x86",
            "64 bit"
          ],
          "product": "AES",
          "vendor": "ASUSTOR Inc.",
          "versions": [
            {
              "lessThanOrEqual": "1.1.1.3113",
              "status": "affected",
              "version": "AES 1.0",
              "versionType": "custom"
            }
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          "type": "finder",
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        }
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      "datePublic": "2026-08-04T07:25:00.000Z",
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              "type": "text/html",
              "value": "The background service of ABP or AES runs as NT AUTHORITY\\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is readable by standard users and protected using DPAPI. Any authenticated local user can recover the key and forge valid IPC requests. Furthermore, the service does not check the identity of the requesting process and validates destination paths using an insufficient substring check. A local attacker can submit crafted encrypted requests containing directory traversal sequences to perform arbitrary file reads and arbitrary file writes as NT AUTHORITY\\SYSTEM, leading to full local privilege escalation.\u003cbr\u003eAffected products and versions include: ABP (ASUSTOR Backup Plan) 2.0.7.10171 and earlier as well as AES (ASUSTOR EZSync) 1.1.1.3113 and earlier."
            }
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          "value": "The background service of ABP or AES runs as NT AUTHORITY\\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is readable by standard users and protected using DPAPI. Any authenticated local user can recover the key and forge valid IPC requests. Furthermore, the service does not check the identity of the requesting process and validates destination paths using an insufficient substring check. A local attacker can submit crafted encrypted requests containing directory traversal sequences to perform arbitrary file reads and arbitrary file writes as NT AUTHORITY\\SYSTEM, leading to full local privilege escalation.\nAffected products and versions include: ABP (ASUSTOR Backup Plan) 2.0.7.10171 and earlier as well as AES (ASUSTOR EZSync) 1.1.1.3113 and earlier."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-114",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-114 Authentication Abuse"
            }
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      "metrics": [
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          "cvssV4_0": {
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            "Recovery": "NOT_DEFINED",
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            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
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      "problemTypes": [
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          "descriptions": [
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          "descriptions": [
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              "description": "CWE-269 Improper Privilege Management",
              "lang": "en",
              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-04T09:18:51.327Z",
        "orgId": "f35eaae9-79f2-4d0d-a5c7-7bea6ed6be77",
        "shortName": "ASUSTOR1"
      },
      "references": [
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            "vendor-advisory"
          ],
          "url": "https://www.asustor.com/security/security_advisory_detail?id=70"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "An improper authentication and path traversal vulnerability exists in ASUSTOR Backup Plan and ASUSTOR EZ Sync.",
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  },
  "cveMetadata": {
    "assignerOrgId": "f35eaae9-79f2-4d0d-a5c7-7bea6ed6be77",
    "assignerShortName": "ASUSTOR1",
    "cveId": "CVE-2026-18759",
    "datePublished": "2026-08-04T07:25:09.087Z",
    "dateReserved": "2026-08-04T04:29:50.772Z",
    "dateUpdated": "2026-08-04T13:33:51.752Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-2P27-7HCF-MPP3

CVE-2026-18759 (GCVE-0-2026-18759)

Tags

Sightings

Nomenclature