{"id":"CVE-2026-87886","aliases":["EUVD-2026-82595","GHSA-hrq3-qgq7-jm9x"],"status":"published","title":"Local privilege escalation due to insecure file permissions. The following products are affected:...","description":"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.","severity":{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00233,"percentile":0.14318,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-276"],"published":"2026-09-17T22:57:18Z","modified":"2026-09-18T19:29:35Z","kev":{"date_added":"2026-09-16","due_date":"2026-09-19","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (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.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-09-16"},{"source":"kev","since":"2026-09-16"}],"products":[{"vendor":"acronis","product":"acronis backup extension for plesk"},{"vendor":"acronis","product":"acronis backup plugin for cpanel \u0026 whm"},{"vendor":"acronis","product":"acronis backup plugin for directadmin"},{"vendor":"acronis","product":"acronis_backup"},{"vendor":"acronis","product":"backup"}],"references":[{"url":"https://security-advisory.acronis.com/advisories/SEC-10986","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886","tags":["exploit","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87886"},{"url":"https://github.com/advisories/GHSA-hrq3-qgq7-jm9x"}],"sources":{"cve":[{"id":"CVE-2026-87886","description":"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.","status":"published","published":"2026-09-17T22:57:18.089Z","modified":"2026-09-18T14:33:42.532Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T13:37:47.463822Z"}],"euvd":[{"id":"EUVD-2026-82595","description":"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.","status":"published","published":"2026-09-17T22:57:18Z","modified":"2026-09-18T14:33:42Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2026-09-16","updated_at":"2026-11-02T17:28:08.898956Z"}],"ghsa":[{"id":"GHSA-hrq3-qgq7-jm9x","title":"Local privilege escalation due to insecure file permissions. The following products are affected:...","description":"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.","status":"published","published":"2026-09-18T00:31:10Z","modified":"2026-09-18T15:32:10Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T15:12:10.152672Z"}],"kev":[{"id":"CVE-2026-87886","title":"Acronis Backup Incorrect Default Permissions Vulnerability","description":"Acronis Backup plugin for cPanel \u0026 WHM and extension for Plesk contains an incorrect default permissions vulnerability that could allow for privilege escalation.","cwes":["CWE-276"],"kev":{"date_added":"2026-09-16","due_date":"2026-09-19","required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (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.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-87886","description":"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.","status":"published","published":"2026-09-17T23:18:53.763Z","modified":"2026-09-18T19:29:35.067Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:12:49.70655Z"}]}}