{"cve":"CVE-2021-41072","nvd":{"published":"2021-09-14T01:15:07.747","modified":"2026-06-17T04:07:49.040","status":"Modified","description":"squashfs_opendir in unsquash-2.c in Squashfs-Tools 4.5 allows Directory Traversal, a different vulnerability than CVE-2021-40153. A squashfs filesystem that has been crafted to include a symbolic link and then contents under the same filename in a filesystem can cause unsquashfs to first create the symbolic link pointing outside the expected directory, and then the subsequent write operation will cause the unsquashfs process to write through the symbolic link elsewhere in the filesystem.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","score":8.1},"cwes":["CWE-22","CWE-59"],"references":["https://github.com/plougher/squashfs-tools/commit/e0485802ec72996c20026da320650d8362f555bd","https://github.com/plougher/squashfs-tools/issues/72#issuecomment-913833405","https://lists.debian.org/debian-lts-announce/2021/10/msg00017.html","https://security.gentoo.org/glsa/202305-29","https://www.debian.org/security/2021/dsa-4987"],"products":["debian:debian_linux","squashfs-tools_project:squashfs-tools"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-41072","score":0.02296,"percentile":0.83269,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}