Vulnerability-Lookup

CVE-2026-59781 (GCVE-0-2026-59781)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:21 – Updated: 2026-08-18 13:34

Title

Improper validation of custom installation directories on Windows could allow installation into locations with unsafe permissions, increasing the risk of DLL sideloading.

Summary

When Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions. If the target directory allowed unauthorized users to modify its contents, an attacker could place a malicious DLL that could later be loaded by the application, resulting in DLL sideloading. The installer has been hardened to detect potentially unsafe installation directories and now requires explicit user confirmation before proceeding with installation in such locations. This reduces the risk of accidental installation into directories with inappropriate permissions while preserving compatibility with existing deployment scenarios.

Severity

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 12:51 UTC

CWE

CWE-427 - Uncontrolled Search Path Element

Assigner

Zabbix mitre root

References

1 reference

URL	Tags
https://support.zabbix.com/browse/ZBX-28077

Impacted products

1 product

Vendor	Product	Version	CPE status
Zabbix	Zabbix	Affected: 7.4.0 , ≤ 7.4.12 (git) Affected: 7.0.0 , ≤ 7.0.28 (git) Affected: 6.0.0 , ≤ 6.0.47 (git)	guessed

Credits

Zabbix wants to thank Kazuma Matsumoto of GMO Cybersecurity by IERAE, Inc. for finding and reporting this issue.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59781",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-18T12:51:53.740332Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-18T13:34:30.672Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "Packages"
          ],
          "product": "Zabbix",
          "repo": "https://git.zabbix.com/",
          "vendor": "Zabbix",
          "versions": [
            {
              "changes": [
                {
                  "at": "7.4.13",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "7.4.12",
              "status": "affected",
              "version": "7.4.0",
              "versionType": "git"
            },
            {
              "changes": [
                {
                  "at": "7.0.29",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "7.0.28",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "git"
            },
            {
              "changes": [
                {
                  "at": "6.0.48",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "6.0.47",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "git"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn attacker with the ability to write files to an insecure custom installation directory could place a malicious DLL that may be loaded by the application due to the Windows DLL search order.\u003c/p\u003e"
            }
          ],
          "value": "An attacker with the ability to write files to an insecure custom installation directory could place a malicious DLL that may be loaded by the application due to the Windows DLL search order."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Zabbix wants to thank Kazuma Matsumoto of GMO Cybersecurity by IERAE, Inc. for finding and reporting this issue."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eWhen Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions. If the target directory allowed unauthorized users to modify its contents, an attacker could place a malicious DLL that could later be loaded by the application, resulting in DLL sideloading. The installer has been hardened to detect potentially unsafe installation directories and now requires explicit user confirmation before proceeding with installation in such locations. This reduces the risk of accidental installation into directories with inappropriate permissions while preserving compatibility with existing deployment scenarios.\u003c/p\u003e"
            }
          ],
          "value": "When Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions. If the target directory allowed unauthorized users to modify its contents, an attacker could place a malicious DLL that could later be loaded by the application, resulting in DLL sideloading. The installer has been hardened to detect potentially unsafe installation directories and now requires explicit user confirmation before proceeding with installation in such locations. This reduces the risk of accidental installation into directories with inappropriate permissions while preserving compatibility with existing deployment scenarios."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-471",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-471: DLL Search Order Hijacking"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/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": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-427",
              "description": "CWE-427: Uncontrolled Search Path Element",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-18T12:21:29.618Z",
        "orgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
        "shortName": "Zabbix"
      },
      "references": [
        {
          "url": "https://support.zabbix.com/browse/ZBX-28077"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eUpdate the affected components to their respective fixed versions.\u003c/p\u003e"
            }
          ],
          "value": "Update the affected components to their respective fixed versions."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Improper validation of custom installation directories on Windows could allow installation into locations with unsafe permissions, increasing the risk of DLL sideloading.",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eInstall the Zabbix Agent into directories with appropriately restricted access permissions. Verify and adjust permissions on custom installation directories to prevent unprivileged users from modifying their contents.\u003c/p\u003e"
            }
          ],
          "value": "Install the Zabbix Agent into directories with appropriately restricted access permissions. Verify and adjust permissions on custom installation directories to prevent unprivileged users from modifying their contents."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
    "assignerShortName": "Zabbix",
    "cveId": "CVE-2026-59781",
    "datePublished": "2026-08-18T12:21:29.618Z",
    "dateReserved": "2026-07-07T08:30:49.859Z",
    "dateUpdated": "2026-08-18T13:34:30.672Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-59781\",\"sourceIdentifier\":\"security@zabbix.com\",\"published\":\"2026-08-18T13:17:25.340\",\"lastModified\":\"2026-08-18T14:17:15.167\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"When Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions. If the target directory allowed unauthorized users to modify its contents, an attacker could place a malicious DLL that could later be loaded by the application, resulting in DLL sideloading. The installer has been hardened to detect potentially unsafe installation directories and now requires explicit user confirmation before proceeding with installation in such locations. This reduces the risk of accidental installation into directories with inappropriate permissions while preserving compatibility with existing deployment scenarios.\"}],\"affected\":[{\"source\":\"security@zabbix.com\",\"affectedData\":[{\"vendor\":\"Zabbix\",\"product\":\"Zabbix\",\"defaultStatus\":\"unknown\",\"modules\":[\"Packages\"],\"repo\":\"https://git.zabbix.com/\",\"versions\":[{\"version\":\"7.4.0\",\"lessThanOrEqual\":\"7.4.12\",\"versionType\":\"git\",\"status\":\"affected\",\"changes\":[{\"at\":\"7.4.13\",\"status\":\"unaffected\"}]},{\"version\":\"7.0.0\",\"lessThanOrEqual\":\"7.0.28\",\"versionType\":\"git\",\"status\":\"affected\",\"changes\":[{\"at\":\"7.0.29\",\"status\":\"unaffected\"}]},{\"version\":\"6.0.0\",\"lessThanOrEqual\":\"6.0.47\",\"versionType\":\"git\",\"status\":\"affected\",\"changes\":[{\"at\":\"6.0.48\",\"status\":\"unaffected\"}]}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security@zabbix.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/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\",\"baseScore\":5.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-18T12:51:53.740332Z\",\"id\":\"CVE-2026-59781\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@zabbix.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-427\"}]}],\"references\":[{\"url\":\"https://support.zabbix.com/browse/ZBX-28077\",\"source\":\"security@zabbix.com\"}]}}"
  }
}

CERTFR-2026-AVI-1039

Vulnerability from certfr_avis - Published: 2026-08-18 - Updated: 2026-08-18

De multiples vulnérabilités ont été découvertes dans Zabbix. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et une atteinte à l'intégrité des données.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
Zabbix	Zabbix	Zabbix versions 7.4.x antérieures à 7.4.13
Zabbix	Zabbix	Zabbix versions 7.x antérieures à 7.0.29
Zabbix	Zabbix	Zabbix versions 6.x antérieures à 6.0.48

References

Title

Publication Time

Tags

Bulletin de sécurité Zabbix ZBX-28077	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28070	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28068	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28069	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28067	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28074	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28071	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28073	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28072	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28075	2026-08-18	vendor-advisory
Bulletin de sécurité Zabbix ZBX-28076	2026-08-18	vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Zabbix versions 7.4.x ant\u00e9rieures \u00e0 7.4.13",
      "product": {
        "name": "Zabbix",
        "vendor": {
          "name": "Zabbix",
          "scada": false
        }
      }
    },
    {
      "description": "Zabbix versions 7.x ant\u00e9rieures \u00e0 7.0.29",
      "product": {
        "name": "Zabbix",
        "vendor": {
          "name": "Zabbix",
          "scada": false
        }
      }
    },
    {
      "description": "Zabbix versions 6.x ant\u00e9rieures \u00e0 6.0.48",
      "product": {
        "name": "Zabbix",
        "vendor": {
          "name": "Zabbix",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-59781",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-59781"
    },
    {
      "name": "CVE-2026-23934",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23934"
    },
    {
      "name": "CVE-2026-1199",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-1199"
    },
    {
      "name": "CVE-2026-23922",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23922"
    },
    {
      "name": "CVE-2026-23930",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23930"
    },
    {
      "name": "CVE-2026-23931",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23931"
    },
    {
      "name": "CVE-2026-23935",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23935"
    },
    {
      "name": "CVE-2026-23937",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23937"
    },
    {
      "name": "CVE-2026-23938",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23938"
    },
    {
      "name": "CVE-2026-23933",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23933"
    },
    {
      "name": "CVE-2026-23929",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23929"
    }
  ],
  "initial_release_date": "2026-08-18T00:00:00",
  "last_revision_date": "2026-08-18T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-1039",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-08-18T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service \u00e0 distance"
    },
    {
      "description": "Injection de code indirecte \u00e0 distance (XSS)"
    },
    {
      "description": "Atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es"
    },
    {
      "description": "Contournement de la politique de s\u00e9curit\u00e9"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Zabbix. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer un d\u00e9ni de service \u00e0 distance, une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et une atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Zabbix",
  "vendor_advisories": [
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28077",
      "url": "https://support.zabbix.com/browse/ZBX-28077"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28070",
      "url": "https://support.zabbix.com/browse/ZBX-28070"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28068",
      "url": "https://support.zabbix.com/browse/ZBX-28068"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28069",
      "url": "https://support.zabbix.com/browse/ZBX-28069"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28067",
      "url": "https://support.zabbix.com/browse/ZBX-28067"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28074",
      "url": "https://support.zabbix.com/browse/ZBX-28074"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28071",
      "url": "https://support.zabbix.com/browse/ZBX-28071"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28073",
      "url": "https://support.zabbix.com/browse/ZBX-28073"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28072",
      "url": "https://support.zabbix.com/browse/ZBX-28072"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28075",
      "url": "https://support.zabbix.com/browse/ZBX-28075"
    },
    {
      "published_at": "2026-08-18",
      "title": "Bulletin de s\u00e9curit\u00e9 Zabbix ZBX-28076",
      "url": "https://support.zabbix.com/browse/ZBX-28076"
    }
  ]
}

FKIE_CVE-2026-59781

Vulnerability from fkie_nvd - Published: 2026-08-18 13:17 - Updated: 2026-08-18 13:17

Severity

5.4 (Medium) - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security@zabbix.com	https://support.zabbix.com/browse/ZBX-28077

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "Packages"
          ],
          "product": "Zabbix",
          "repo": "https://git.zabbix.com/",
          "vendor": "Zabbix",
          "versions": [
            {
              "changes": [
                {
                  "at": "7.4.13",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "7.4.12",
              "status": "affected",
              "version": "7.4.0",
              "versionType": "git"
            },
            {
              "changes": [
                {
                  "at": "7.0.29",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "7.0.28",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "git"
            },
            {
              "changes": [
                {
                  "at": "6.0.48",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "6.0.47",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "security@zabbix.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions. If the target directory allowed unauthorized users to modify its contents, an attacker could place a malicious DLL that could later be loaded by the application, resulting in DLL sideloading. The installer has been hardened to detect potentially unsafe installation directories and now requires explicit user confirmation before proceeding with installation in such locations. This reduces the risk of accidental installation into directories with inappropriate permissions while preserving compatibility with existing deployment scenarios."
    }
  ],
  "id": "CVE-2026-59781",
  "lastModified": "2026-08-18T13:17:25.340",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security@zabbix.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-18T13:17:25.340",
  "references": [
    {
      "source": "security@zabbix.com",
      "url": "https://support.zabbix.com/browse/ZBX-28077"
    }
  ],
  "sourceIdentifier": "security@zabbix.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-427"
        }
      ],
      "source": "security@zabbix.com",
      "type": "Secondary"
    }
  ]
}

GHSA-734C-5898-QRPH

Vulnerability from github – Published: 2026-08-18 15:31 – Updated: 2026-08-18 15:31

Details

Severity

5.4 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-59781"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-427"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-18T13:17:25Z",
    "severity": "MODERATE"
  },
  "details": "When Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions. If the target directory allowed unauthorized users to modify its contents, an attacker could place a malicious DLL that could later be loaded by the application, resulting in DLL sideloading. The installer has been hardened to detect potentially unsafe installation directories and now requires explicit user confirmation before proceeding with installation in such locations. This reduces the risk of accidental installation into directories with inappropriate permissions while preserving compatibility with existing deployment scenarios.",
  "id": "GHSA-734c-5898-qrph",
  "modified": "2026-08-18T15:31:37Z",
  "published": "2026-08-18T15:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59781"
    },
    {
      "type": "WEB",
      "url": "https://support.zabbix.com/browse/ZBX-28077"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/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"
    }
  ]
}

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-2026-59781 (GCVE-0-2026-59781)

CERTFR-2026-AVI-1039

Solutions

FKIE_CVE-2026-59781

GHSA-734C-5898-QRPH

Tags

Sightings

Nomenclature