{"id":"CVE-2021-39543","aliases":["EUVD-2021-25900","GHSA-c8mx-ccv3-h6hj"],"status":"published","title":"An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the...","description":"An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Analyze::AnalyzeRoot() located in analyze.cpp. It allows an attacker to cause Denial of Service.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00635,"percentile":0.50918,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2021-09-20T15:26:56Z","modified":"2026-06-17T04:03:47Z","products":[{"vendor":"pdftools_project","product":"pdftools"}],"references":[{"url":"https://github.com/leonhad/pdftools/issues/1","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39543"},{"url":"https://github.com/advisories/GHSA-c8mx-ccv3-h6hj"}],"sources":{"cve":[{"id":"CVE-2021-39543","description":"An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Analyze::AnalyzeRoot() located in analyze.cpp. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-09-20T15:26:56Z","modified":"2024-08-04T02:06:42.548Z","updated_at":"2026-11-02T14:33:09.864034Z"}],"euvd":[{"id":"EUVD-2021-25900","description":"An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Analyze::AnalyzeRoot() located in analyze.cpp. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-09-20T15:26:56Z","modified":"2024-08-04T02:06:42Z","updated_at":"2026-11-03T03:24:23.166742Z"}],"ghsa":[{"id":"GHSA-c8mx-ccv3-h6hj","title":"An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the...","description":"An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Analyze::AnalyzeRoot() located in analyze.cpp. It allows an attacker to cause Denial of Service.","status":"published","published":"2022-05-24T19:15:09Z","modified":"2023-01-30T05:02:17Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:46:36.123786Z"}],"nvd":[{"id":"CVE-2021-39543","description":"An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function Analyze::AnalyzeRoot() located in analyze.cpp. It allows an attacker to cause Denial of Service.","status":"published","published":"2021-09-20T16:15:12.743Z","modified":"2026-06-17T04:03:47.45Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:06:58.933037Z"}]}}