{"id":"CVE-2021-28639","published":"2021-08-20T18:09:59Z","modified":"2024-09-16T16:32:30Z","title":"Adobe Acrobat Reader DC setAction Use-After-Free Remote Code Execution Vulnerability","vendor":"Adobe","product":"Acrobat Reader","tier":"core","eol":null,"affectedVersions":[{"vendor":"Adobe","product":"Acrobat Reader","versions":[">= unspecified, <= 2020.004.30005",">= unspecified, <= 2017.011.30197",">= unspecified, <= 2021.005.20054",">= unspecified, <= None"]}],"description":{"text":"Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by an Use-after-free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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.","provenance":"source","from":"CVE.org"},"summary":{"text":"Adobe Acrobat Reader DC contains a use-after-free flaw in its setAction handling, which is a memory-corruption weakness in the Reader component. An unauthenticated attacker who gets a victim to open a malicious file can achieve arbitrary code execution in the context of the current user, with no prior authentication needed and local access required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T07:17:28Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.66052,"percentile":0.99273,"date":"2026-10-31","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":null,"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://helpx.adobe.com/security/products/acrobat/apsb21-51.html","tags":["x_refsource_MISC"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-15308","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-15308","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2021-08-20","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2021-28639","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":25.3,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.85,"detail":"percentile 0.9927"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-adobe-acrobat-reader-cwe-416"}}