{"id":"CVE-2024-39420","aliases":["EUVD-2024-37965","GHSA-rx7q-7v9g-75wg"],"status":"published","title":"Acrobat Reader | Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)","description":"Acrobat Reader versions 20.005.30636, 24.002.21005, 24.001.30159, 20.005.30655, 24.002.20965, 24.002.20964, 24.001.30123, 24.003.20054 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could lead to arbitrary code execution. This vulnerability arises when the timing of actions changes the state of a resource between the checking of a condition and the use of the resource, allowing an attacker to manipulate the resource in a harmful way. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.03492,"percentile":0.89293,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367"],"published":"2024-08-14T15:07:28Z","modified":"2026-06-17T07:41:54Z","products":[{"vendor":"adobe","product":"acrobat"},{"vendor":"adobe","product":"acrobat reader"},{"vendor":"adobe","product":"acrobat_dc"},{"vendor":"adobe","product":"acrobat_reader"},{"vendor":"adobe","product":"acrobat_reader_dc"}],"references":[{"url":"https://helpx.adobe.com/security/products/acrobat/apsb24-70.html","tags":["vendor-advisory"]},{"url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2024-2011"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39420"},{"url":"https://helpx.adobe.com/security/products/acrobat/apsb24-57.html"},{"url":"https://github.com/advisories/GHSA-rx7q-7v9g-75wg"}],"sources":{"cve":[{"id":"CVE-2024-39420","title":"Acrobat Reader | Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)","description":"Acrobat Reader versions 20.005.30636, 24.002.21005, 24.001.30159, 20.005.30655, 24.002.20965, 24.002.20964, 24.001.30123, 24.003.20054 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could lead to arbitrary code execution. This vulnerability arises when the timing of actions changes the state of a resource between the checking of a condition and the use of the resource, allowing an attacker to manipulate the resource in a harmful way. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2024-08-14T15:07:28.784Z","modified":"2024-09-16T12:30:11.437Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:34:19.28149Z"}],"euvd":[{"id":"EUVD-2024-37965","description":"Acrobat Reader versions 20.005.30636, 24.002.21005, 24.001.30159, 20.005.30655, 24.002.20965, 24.002.20964, 24.001.30123, 24.003.20054 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could lead to arbitrary code execution. This vulnerability arises when the timing of actions changes the state of a resource between the checking of a condition and the use of the resource, allowing an attacker to manipulate the resource in a harmful way. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2024-08-14T15:07:28Z","modified":"2024-09-16T12:30:11Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:55.02611Z"}],"ghsa":[{"id":"GHSA-rx7q-7v9g-75wg","title":"Acrobat Reader versions 20.005.30636, 24.002.20965, 24.002.20964, 24.001.30123 and earlier are...","description":"Acrobat Reader versions 20.005.30636, 24.002.20965, 24.002.20964, 24.001.30123 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could result in arbitrary code execution in the context of the current user. This issue occurs when the state of a resource changes between its check-time and use-time, allowing an attacker to manipulate the resource. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2024-08-14T15:31:17Z","modified":"2024-09-13T09:31:32Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:58:15.804018Z"}],"nvd":[{"id":"CVE-2024-39420","description":"Acrobat Reader versions 20.005.30636, 24.002.21005, 24.001.30159, 20.005.30655, 24.002.20965, 24.002.20964, 24.001.30123, 24.003.20054 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could lead to arbitrary code execution. This vulnerability arises when the timing of actions changes the state of a resource between the checking of a condition and the use of the resource, allowing an attacker to manipulate the resource in a harmful way. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2024-08-14T15:15:24.96Z","modified":"2026-06-17T07:41:54.47Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:10:19.135392Z"}]}}