FKIE_CVE-2026-87886

Vulnerability from fkie_nvd - Published: 2026-09-17 23:18 - Updated: 2026-09-18 19:29
Severity
7.8 (High) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Local privilege escalation due to insecure file permissions. The following products are affected: Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238.
References
security@acronis.comhttps://security-advisory.acronis.com/advisories/SEC-10986Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886US Government Resource
Impacted products
Vendor Product Version
acronis acronis_backup *
acronis acronis_backup *
acronis acronis_backup *
acronis acronis_backup 1.9.3
acronis acronis_backup 1.9.3
acronis acronis_backup 1.9.3
linux linux_kernel -
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Linux"
          ],
          "product": "Acronis Backup plugin for cPanel \u0026 WHM",
          "vendor": "Acronis",
          "versions": [
            {
              "lessThan": "1.9.3.1021",
              "status": "affected",
              "version": "unspecified",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Linux"
          ],
          "product": "Acronis Backup extension for Plesk",
          "vendor": "Acronis",
          "versions": [
            {
              "lessThan": "1.8.11.638",
              "status": "affected",
              "version": "unspecified",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Linux"
          ],
          "product": "Acronis Backup plugin for DirectAdmin",
          "vendor": "Acronis",
          "versions": [
            {
              "lessThan": "1.2.3.238",
              "status": "affected",
              "version": "unspecified",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@acronis.com"
    }
  ],
  "cisaActionDue": "2026-09-19",
  "cisaExploitAdd": "2026-09-16",
  "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "Acronis Backup Incorrect Default Permissions Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:directadmin:*:*",
              "matchCriteriaId": "4CB8B9F6-DAB7-4F21-B2B4-0EE01347AC1E",
              "versionEndExcluding": "1.2.3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:plesk:*:*",
              "matchCriteriaId": "AEA7BEC1-B14B-4ED9-8FA8-D602D612BCA2",
              "versionEndExcluding": "1.8.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:cpanel:*:*",
              "matchCriteriaId": "1F03983F-EC1E-4831-BF34-69331B521543",
              "versionEndExcluding": "1.9.3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:acronis:acronis_backup:1.9.3:-:*:*:*:cpanel:*:*",
              "matchCriteriaId": "61BB35F9-D0AB-484A-8C9F-BA79DD51916B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix1:*:*:*:cpanel:*:*",
              "matchCriteriaId": "C9442FB3-3ECF-49D7-9940-41F296D7D0BC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix2:*:*:*:cpanel:*:*",
              "matchCriteriaId": "E892B84E-B369-4E1A-B9B6-57FBD1F96AFC",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Local privilege escalation due to insecure file permissions. The following products are affected: Acronis Backup plugin for cPanel \u0026 WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238."
    }
  ],
  "id": "CVE-2026-87886",
  "lastModified": "2026-09-18T19:29:35.067",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "security@acronis.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-87886",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-18T12:27:59.851837Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-17T23:18:53.763",
  "references": [
    {
      "source": "security@acronis.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://security-advisory.acronis.com/advisories/SEC-10986"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886"
    }
  ],
  "sourceIdentifier": "security@acronis.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-276"
        }
      ],
      "source": "security@acronis.com",
      "type": "Secondary"
    }
  ]
}



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