CVE-2026-87886

{"id": "CVE-2026-87886", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-87886", "role": "CISA Coordinator", "options": [{"exploitation": "active"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-18T12:27:59.851837Z"}}], "cvssMetricV30": [{"type": "Secondary", "source": "security@acronis.com", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security@acronis.com", "affectedData": [{"vendor": "Acronis", "product": "Acronis Backup plugin for cPanel & WHM", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "1.9.3.1021", "versionType": "semver"}], "platforms": ["Linux"], "defaultStatus": "unaffected"}, {"vendor": "Acronis", "product": "Acronis Backup extension for Plesk", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "1.8.11.638", "versionType": "semver"}], "platforms": ["Linux"], "defaultStatus": "unaffected"}, {"vendor": "Acronis", "product": "Acronis Backup plugin for DirectAdmin", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "1.2.3.238", "versionType": "semver"}], "platforms": ["Linux"], "defaultStatus": "unaffected"}]}], "published": "2026-09-17T23:18:53.763", "references": [{"url": "https://security-advisory.acronis.com/advisories/SEC-10986", "tags": ["Vendor Advisory"], "source": "security@acronis.com"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@acronis.com", "description": [{"lang": "en", "value": "CWE-276"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-18T19:29:35.067", "cisaActionDue": "2026-09-19", "cisaExploitAdd": "2026-09-16", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:directadmin:*:*", "vulnerable": true, "matchCriteriaId": "4CB8B9F6-DAB7-4F21-B2B4-0EE01347AC1E", "versionEndExcluding": "1.2.3"}, {"criteria": "cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:plesk:*:*", "vulnerable": true, "matchCriteriaId": "AEA7BEC1-B14B-4ED9-8FA8-D602D612BCA2", "versionEndExcluding": "1.8.11"}, {"criteria": "cpe:2.3:a:acronis:acronis_backup:*:*:*:*:*:cpanel:*:*", "vulnerable": true, "matchCriteriaId": "1F03983F-EC1E-4831-BF34-69331B521543", "versionEndExcluding": "1.9.3"}, {"criteria": "cpe:2.3:a:acronis:acronis_backup:1.9.3:-:*:*:*:cpanel:*:*", "vulnerable": true, "matchCriteriaId": "61BB35F9-D0AB-484A-8C9F-BA79DD51916B"}, {"criteria": "cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix1:*:*:*:cpanel:*:*", "vulnerable": true, "matchCriteriaId": "C9442FB3-3ECF-49D7-9940-41F296D7D0BC"}, {"criteria": "cpe:2.3:a:acronis:acronis_backup:1.9.3:hotfix2:*:*:*:cpanel:*:*", "vulnerable": true, "matchCriteriaId": "E892B84E-B369-4E1A-B9B6-57FBD1F96AFC"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@acronis.com", "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's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "cisaVulnerabilityName": "Acronis Backup Incorrect Default Permissions Vulnerability"}