Vulnerability-Lookup

GHSA-2G48-2HGV-5JPV

Vulnerability from github – Published: 2026-07-22 18:32 – Updated: 2026-07-27 18:31

Details

Duplicati v2.3.0.1 backup software gives Authenticated Users MODIFY permissions that propagate to all subdirectories. Installing the software outside of the Program Files directory, or on a custom path, creates a LocalSystem service running from a directory that any standard local user can write to. A standard local user can overwrite any DLL in the service directory. On service restart, the OS loads the attacker's DLL before any managed code runs, executing arbitrary code as SYSTEM.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-16157"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-732"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-22T18:16:55Z",
    "severity": "HIGH"
  },
  "details": "Duplicati v2.3.0.1 backup software gives Authenticated Users MODIFY permissions that propagate to all subdirectories. Installing the software outside of the Program Files directory, or on a custom path, creates a LocalSystem service running from a directory that any standard local user can write to. A standard local user can overwrite any DLL in the service directory. On service restart, the OS loads the attacker\u0027s DLL before any managed code runs, executing arbitrary code as SYSTEM.",
  "id": "GHSA-2g48-2hgv-5jpv",
  "modified": "2026-07-27T18:31:41Z",
  "published": "2026-07-22T18:32:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16157"
    },
    {
      "type": "WEB",
      "url": "https://kb.cert.org/vuls/id/847406"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/847406"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-16157 (GCVE-0-2026-16157)

Vulnerability from cvelistv5 – Published: 2026-07-22 17:29 – Updated: 2026-07-27 17:03

Title

Duplicati backup software v2.3.0.1 is vulnerable to an incorrect permission assignment vulnerability

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-27 17:03 UTC

CWE

CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

certcc mitre root

References

2 references

URL	Tags
https://kb.cert.org/vuls/id/847406
https://www.kb.cert.org/vuls/id/847406

Impacted products

1 product

Vendor	Product	Version
Duplicati	Duplicati	Affected: 2.3.0.1

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JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-07-22T18:25:41.589Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.kb.cert.org/vuls/id/847406"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-16157",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-27T17:03:33.187898Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-732",
                "description": "CWE-732 Incorrect Permission Assignment for Critical Resource",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-27T17:03:37.752Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Duplicati",
          "vendor": "Duplicati",
          "versions": [
            {
              "status": "affected",
              "version": "2.3.0.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Duplicati v2.3.0.1 backup software gives Authenticated Users MODIFY permissions that propagate to all subdirectories. Installing the software outside of the Program Files directory, or on a custom path, creates a LocalSystem service running from a directory that any standard local user can write to. A standard local user can overwrite any DLL in the service directory. On service restart, the OS loads the attacker\u0027s DLL before any managed code runs, executing arbitrary code as SYSTEM."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-732: Incorrect Permission Assignment for Critical Resource",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-22T17:29:25.278Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://kb.cert.org/vuls/id/847406"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Duplicati backup software v2.3.0.1 is vulnerable to an incorrect permission assignment vulnerability",
      "x_generator": {
        "engine": "VINCE 3.0.43",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-16157"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-16157",
    "datePublished": "2026-07-22T17:29:25.278Z",
    "dateReserved": "2026-07-17T19:45:55.953Z",
    "dateUpdated": "2026-07-27T17:03:37.752Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

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.
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GHSA-2G48-2HGV-5JPV

CVE-2026-16157 (GCVE-0-2026-16157)

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