{"id":"CVE-2020-21840","title":"A heap based buffer overflow vulnerability exits in GNU LibreDWG 0.10 via bit_search_sentinel ../../src/bits.c:1985.","summary":"A heap based buffer overflow vulnerability exits in GNU LibreDWG 0.10 via bit_search_sentinel ../../src/bits.c:1985.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"gnu","product":"libredwg","affected":["libredwg = 0.10"],"published":"2021-05-17","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-21840","references":[{"url":"http://libredwg.com","label":"cve@mitre.org"},{"url":"https://github.com/LibreDWG/libredwg/issues/188#issuecomment-574493513","label":"cve@mitre.org"},{"url":"http://gnu.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://libredwg.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/LibreDWG/libredwg/issues/188#issuecomment-574493513","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01073,"epssPercentile":0.63464,"ingestedAt":"2026-07-05T00:59:26.411Z","slug":"CVE-2020-21840","body":"## Overview\n\nA heap based buffer overflow vulnerability exits in GNU LibreDWG 0.10 via bit_search_sentinel ../../src/bits.c:1985.\n\n## Affected\n\n- `libredwg = 0.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}