{"id":"CVE-2020-21816","title":"A heab based buffer overflow issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:46.","summary":"A heab based buffer overflow issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:46.","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 = 0.10.2641"],"published":"2021-05-17","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-21816","references":[{"url":"https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572890865","label":"cve@mitre.org"},{"url":"http://gnu.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572890865","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01133,"epssPercentile":0.65041,"ingestedAt":"2026-07-05T00:59:26.218Z","slug":"CVE-2020-21816","body":"## Overview\n\nA heab based buffer overflow issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:46.\n\n## Affected\n\n- `libredwg = 0.10.2641`\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":[]}