{"id":"CVE-2021-39842","aliases":["EUVD-2021-26199","GHSA-m629-r54x-ffhf"],"status":"published","title":"Adobe Acrobat Reader DC messageHandler.OnMessage Use-After-Free Vulnerability","description":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","severity":{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.17352,"percentile":0.97156,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2021-09-29T15:38:04Z","modified":"2026-06-17T04:04:16Z","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/apsb21-55.html","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39842"},{"url":"https://github.com/advisories/GHSA-m629-r54x-ffhf"}],"sources":{"cve":[{"id":"CVE-2021-39842","title":"Adobe Acrobat Reader DC messageHandler.OnMessage Use-After-Free Vulnerability","description":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2021-09-29T15:38:04.665Z","modified":"2024-09-17T01:10:29.759Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:33:09.540052Z"}],"euvd":[{"id":"EUVD-2021-26199","description":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2021-09-29T15:38:04Z","modified":"2024-09-17T01:10:29Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:52.69419Z"}],"ghsa":[{"id":"GHSA-m629-r54x-ffhf","title":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017...","description":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2022-05-24T19:16:05Z","modified":"2023-01-30T05:02:31Z","cwes":["CWE-416"],"updated_at":"2026-11-02T14:46:39.405598Z"}],"nvd":[{"id":"CVE-2021-39842","description":"Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.","status":"published","published":"2021-09-29T16:15:09.323Z","modified":"2026-06-17T04:04:16.297Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:06:59.314106Z"}]}}