{"id":"CVE-2021-21749","aliases":["EUVD-2021-8921","GHSA-q2w2-7h8m-xxvx"],"status":"published","title":"ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit...","description":"ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code.","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":"2026-11-10","score":0.01617,"percentile":0.76232,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2021-10-20T15:22:06Z","modified":"2026-06-17T03:36:05Z","products":[{"vendor":"zte","product":"mf971r_firmware"}],"references":[{"url":"https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1019764","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21749"},{"url":"https://github.com/advisories/GHSA-q2w2-7h8m-xxvx"}],"sources":{"cve":[{"id":"CVE-2021-21749","description":"ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code.","status":"published","published":"2021-10-20T15:22:06Z","modified":"2024-08-03T18:23:29.469Z","updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-8921","description":"ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code.","status":"published","published":"2021-10-20T15:22:06Z","modified":"2024-08-03T18:23:29Z","updated_at":"2026-11-03T03:25:05.131984Z"}],"ghsa":[{"id":"GHSA-q2w2-7h8m-xxvx","title":"ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit...","description":"ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code.","status":"published","published":"2022-05-24T19:18:03Z","modified":"2023-01-30T05:03:07Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:46:46.506128Z"}],"nvd":[{"id":"CVE-2021-21749","description":"ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code.","status":"published","published":"2021-10-20T16:15:08.293Z","modified":"2026-06-17T03:36:05.22Z","cvss":[{"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"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:07:00.137719Z"}]}}