{"id":"CVE-2020-23921","aliases":["EUVD-2020-16658","GHSA-5v8f-79pq-pg2j"],"status":"published","title":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap...","description":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00913,"percentile":0.60333,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2021-04-21T17:41:06Z","modified":"2026-10-20T10:52:50Z","products":[{"vendor":"fast_ber_project","product":"fast_ber"}],"references":[{"url":"https://github.com/Samuel-Tyler/fast_ber/issues/30","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://cwe.mitre.org/data/definitions/126.html","tags":["x_refsource_MISC","x_transferred","Technical Description","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-23921"},{"url":"https://github.com/advisories/GHSA-5v8f-79pq-pg2j"}],"sources":{"cve":[{"id":"CVE-2020-23921","description":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.","status":"published","published":"2021-04-21T17:41:06Z","modified":"2024-08-04T15:05:11.178Z","updated_at":"2026-11-02T14:35:49.209579Z"}],"euvd":[{"id":"EUVD-2020-16658","description":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.","status":"published","published":"2021-04-21T17:41:06Z","modified":"2024-08-04T15:05:11Z","updated_at":"2026-11-03T03:07:20.733107Z"}],"ghsa":[{"id":"GHSA-5v8f-79pq-pg2j","title":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap...","description":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.","status":"published","published":"2022-05-24T17:48:02Z","modified":"2023-01-27T05:03:00Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:42:09.126228Z"}],"nvd":[{"id":"CVE-2020-23921","description":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.","status":"published","published":"2021-04-21T18:15:08.307Z","modified":"2026-06-17T03:05:05.493Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:06:39.25999Z"}],"osv":[{"id":"CVE-2020-23921","description":"An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.","status":"published","published":"2021-04-21T18:15:08.307Z","modified":"2026-10-20T10:52:50.297663607Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:15.534837Z"}]}}