{"id":"CVE-2021-26557","aliases":["EUVD-2021-13356","GHSA-jjvc-94pp-59jx"],"status":"published","title":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set...","description":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00324,"percentile":0.25749,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-426"],"published":"2021-10-07T01:00:13Z","modified":"2026-10-24T10:30:28Z","products":[{"vendor":"octopus","product":"tentacle"},{"vendor":"octopus deploy","product":"octopus tentacle"}],"references":[{"url":"https://advisories.octopus.com/adv/2021-02---Local-privilege-escalation-in-Octopus-Tentacle-%28CVE-2021-26557%29.1732870264.html","tags":["x_refsource_MISC","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26557"},{"url":"https://advisories.octopus.com/adv/2021-02---Local-privilege-escalation-in-Octopus-Tentacle-(CVE-2021-26557).1732870264.html"},{"url":"https://github.com/advisories/GHSA-jjvc-94pp-59jx"}],"sources":{"cve":[{"id":"CVE-2021-26557","description":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.","status":"published","published":"2021-10-07T01:00:13Z","modified":"2024-08-03T20:26:25.487Z","updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-13356","description":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.","status":"published","published":"2021-10-07T01:00:13Z","modified":"2024-08-03T20:26:25Z","updated_at":"2026-11-03T03:24:51.40664Z"}],"ghsa":[{"id":"GHSA-jjvc-94pp-59jx","title":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set...","description":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.","status":"published","published":"2022-05-24T19:16:59Z","modified":"2023-01-30T05:02:28Z","cwes":["CWE-426"],"updated_at":"2026-11-02T14:46:38.945282Z"}],"nvd":[{"id":"CVE-2021-26557","description":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.","status":"published","published":"2021-10-07T01:15:07.057Z","modified":"2026-06-17T03:43:28.35Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.4,"vector":"AV:L/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-426"],"updated_at":"2026-11-02T14:06:59.314106Z"}],"osv":[{"id":"CVE-2021-26557","description":"When Octopus Tentacle is installed using a custom folder location, folder ACLs are not set correctly and could lead to an unprivileged user using DLL side-loading to gain privileged access.","status":"published","published":"2021-10-07T01:15:07.057Z","modified":"2026-10-24T10:30:28.247931624Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:18.778776Z"}]}}