{"id":"CVE-2021-34193","aliases":["AZL-28094","DEBIAN-CVE-2021-34193","DLA-4004-1","EUVD-2021-20855","GHSA-882v-v6g5-f7qr"],"status":"published","title":"Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to...","description":"Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to APDUs.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01389,"percentile":0.72658,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2023-08-22T00:00:00Z","modified":"2026-10-24T10:30:41Z","fixes":[{"ecosystem":"Azure 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List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30800","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30112","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28768","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28855","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32149","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28185","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29912","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28843","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31540","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28383","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31448","tags":["x_transferred","Issue Tracking","Mailing List","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/12/msg00026.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34193","tags":["web"]},{"url":"https://github.com/advisories/GHSA-882v-v6g5-f7qr"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-34193","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-34193","description":"Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to APDUs.","status":"published","published":"2023-08-22T00:00:00Z","modified":"2025-11-03T21:44:50.492Z","updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-20855","description":"Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to APDUs.","status":"published","published":"2023-08-22T00:00:00Z","modified":"2025-11-03T21:44:50Z","updated_at":"2026-11-02T19:49:31.7352Z"}],"ghsa":[{"id":"GHSA-882v-v6g5-f7qr","title":"Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to...","description":"Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to 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APDUs.","status":"published","published":"2023-08-22T19:16:20.913Z","modified":"2026-10-23T18:03:26.852203162Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"DLA-4004-1","title":"opensc - security update","status":"published","published":"2024-12-28T00:00:00Z","modified":"2026-03-09T01:19:21.029361Z","updated_at":"2026-11-02T15:46:12.203458Z"}]}}