{"cve":"CVE-2021-33464","nvd":{"published":"2022-07-26T13:15:09.730","modified":"2026-06-17T03:54:35.943","status":"Modified","description":"An issue was discovered in yasm version 1.3.0. There is a heap-buffer-overflow in inc_fopen() in modules/preprocs/nasm/nasm-pp.c.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-787"],"references":["https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d","https://github.com/yasm/yasm/issues/164","https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d","https://github.com/yasm/yasm/issues/164"],"products":["tortall:yasm"],"source":"nvd","synced_at":"2026-10-19T21:33:44.859608815+00:00"},"epss":{"cve":"CVE-2021-33464","score":0.00325,"percentile":0.2555,"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."]}