{"id":"CVE-2021-31800","aliases":["ALPINE-CVE-2021-31800","DEBIAN-CVE-2021-31800","EUVD-2021-0100","GHSA-mj63-64x7-57xf","PYSEC-2021-17","UBUNTU-CVE-2021-31800","openSUSE-SU-2024:11232-1","openSUSE-SU-2024:14142-1","openSUSE-SU-2026:12011-1"],"status":"published","title":"Path traversal in impacket","description":"Multiple path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. An attacker that connects to a running smbserver instance can list and write to arbitrary files via ../ directory traversal. 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key.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.19409,"percentile":0.97401,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-22"],"published":"2021-05-05T10:24:10Z","modified":"2026-11-03T06:32:40Z","exploits":[{"source":"pocgithub","id":"p0dalirius/CVE-2021-31800-Impacket-SMB-Server-Arbitrary-file-read-write","title":"p0dalirius/CVE-2021-31800-Impacket-SMB-Server-Arbitrary-file-read-write","date":"2022-08-28","url":"https://github.com/p0dalirius/CVE-2021-31800-Impacket-SMB-Server-Arbitrary-file-read-write"},{"source":"pocgithub","id":"Louzogh/CVE-2021-31800","title":"Louzogh/CVE-2021-31800","date":"2022-09-02","url":"https://github.com/Louzogh/CVE-2021-31800"}],"fixes":[{"ecosystem":"PyPI","package":"impacket","fixed_in":["0.9.23"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.14","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"py3-impacket","fixed_in":["0.9.23-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"impacket","fixed_in":["0.9.22-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"impacket","fixed_in":["0.9.22-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"impacket","fixed_in":["0.9.22-2"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"python-impacket","fixed_in":["0.11.0-3.3"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"py3-impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.22-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.22-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.22-2"}]}]},{"source":"osv","ecosystem":"PyPI","package":"impacket","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23"}]}],"versions":["0.9.10","0.9.11","0.9.12","0.9.13","0.9.14","0.9.15","0.9.17","0.9.18","0.9.19","0.9.20","0.9.21","0.9.22"]},{"source":"osv","ecosystem":"PyPI","p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path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. 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