{"id":"CVE-2026-87886","title":"Local privilege escalation due to insecure file permissions","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,…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-276"],"vendor":"acronis","product":"acronis_backup","affected":["acronis_backup < 1.2.3","acronis_backup < 1.8.11","acronis_backup < 1.9.3","acronis_backup = 1.9.3"],"patched":["acronis_backup 1.9.3"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T19:29:35.067","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87886","references":[{"url":"https://security-advisory.acronis.com/advisories/SEC-10986","label":"security@acronis.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.cisa.gov/know%20n-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87886","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild","cve.org","exploit-available"],"epss":0.00254,"epssPercentile":0.17289,"kev":true,"kevDateAdded":"2026-09-16","kevDueDate":"2026-09-19","kevRansomware":false,"exploited":true,"zeroDay":true,"exploitAvailable":true,"ssvc":{"exploitation":"active","automatable":"no","technicalImpact":"total","timestamp":"2026-09-18T12:27:59.851837Z"},"ingestedAt":"2026-09-17T23:31:20.688Z","slug":"CVE-2026-87886","body":"## Overview\n\nLocal 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.\n\n## Affected\n\n- `acronis_backup < 1.2.3`\n- `acronis_backup < 1.8.11`\n- `acronis_backup < 1.9.3`\n- `acronis_backup = 1.9.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `acronis_backup 1.9.3`","depth":"abyssal","depthScore":68,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":25,"ransomware":0},"changes":[{"seq":206780,"id":"CVE-2026-87886","ts":1789735283912,"field":"exploit_available","old":"false","new":"true"}]}