{"id":"CVE-2021-3155","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-3155","generatedAt":"2026-10-27T20:20:13.052Z","title":"This could allow a local attacker to read information that should have been private.","description":"snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1","published":"2022-02-17T23:15:07.000Z","lastModified":"2026-06-17T04:04:46.000Z","status":"Modified","sourceIdentifier":"security@ubuntu.com","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-276"],"affected":["canonical/snapd","canonical/ubuntu linux"],"epss":{"score":0.0026,"percentile":0.1762,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85","tags":["Patch","Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca","tags":["Patch","Third Party Advisory"],"source":"security@ubuntu.com"},{"url":"https://ubuntu.com/security/notices/USN-5292-1","tags":["Patch","Vendor Advisory"],"source":"security@ubuntu.com"},{"url":"https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://ubuntu.com/security/notices/USN-5292-1","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3155","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}