{"id":"CVE-2016-7855","published":"2016-11-01T22:59:00Z","modified":"2026-06-17T00:53:36Z","title":"Adobe Flash Player Use-After-Free Vulnerability","vendor":"Adobe","product":"Flash Player","tier":"core","eol":{"product":"Adobe Flash Player","since":"2020-12-31","note":"No security updates; remove it."},"description":{"text":"Use-after-free vulnerability in Adobe Flash Player before 23.0.0.205 on Windows and OS X and before 11.2.202.643 on Linux allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in October 2016.","provenance":"source","from":"NVD"},"summary":{"text":"Adobe Flash Player contains a use-after-free memory corruption flaw in its core component, affecting builds before 23.0.0.205 on Windows and macOS and before 11.2.202.643 on Linux. An attacker who can get a user to interact with malicious content (such as opening a crafted page or file) and who has network access to deliver it can execute arbitrary code, with no authentication required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:12:41Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.25198,"percentile":0.97927,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2022-03-03","dueDate":"2022-03-24","ransomware":false,"requiredAction":"The impacted product is end-of-life and should be disconnected if still in use.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2016-7855","provenance":"source"},"vulncheckKev":{"dateAdded":"2016-10-21","exploitedFirstSeen":"2016-10-21","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2016-10-21"},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-7855","date":"2016-11-01"},{"url":"https://unit42.paloaltonetworks.com/unit42-let-ride-sofacy-groups-dealerschoice-attacks-continue/","date":"2016-12-15"},{"url":"https://us-cert.cisa.gov/sites/default/files/publications/AR-17-20045_Enhanced_Analysis_of_GRIZZLY_STEPPE_Activity.pdf","date":"2017-02-10"},{"url":"https://dl.acm.org/doi/pdf/10.1145/3465481.3465758","date":"2021-08-17"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-03-03"},{"url":"https://strapi.eurepoc.eu/uploads/Eu_Repo_C_APT_profile_APT_28_4856c0a0ac.pdf","date":"2023-02-05"}],"evidenceTotal":7,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"http://rhn.redhat.com/errata/RHSA-2016-2119.html","tags":["Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/93861","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1037111","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-128","tags":["Patch","Vendor Advisory"]},{"url":"https://helpx.adobe.com/security/products/flash-player/apsb16-36.html","tags":["Patch","Vendor Advisory"]},{"url":"https://security.gentoo.org/glsa/201610-10","tags":["Third Party Advisory"]},{"url":"https://security.googleblog.com/2016/10/disclosing-vulnerabilities-to-protect.html","tags":["Third Party Advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2016-2119.html","tags":["Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/93861","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://www.securitytracker.com/id/1037111","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-128","tags":["Patch","Vendor Advisory"]},{"url":"https://helpx.adobe.com/security/products/flash-player/apsb16-36.html","tags":["Patch","Vendor Advisory"]},{"url":"https://security.gentoo.org/glsa/201610-10","tags":["Third Party Advisory"]},{"url":"https://security.googleblog.com/2016/10/disclosing-vulnerabilities-to-protect.html","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-7855","tags":["US Government Resource"]}],"techniques":[{"id":"T1189","name":"Drive-by Compromise","tactics":["initial-access"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Use After Free","mappingType":"exploitation_technique","evidence":[],"comment":"This vulnerability is exploited by having users visit a maliciously website.","confidence":"high"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2016-8704","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-8704","exploited":true,"exploitedSince":"2022-03-03","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2016-10-26","earliestUrl":"https://github.com/swagatbora90/CheckFlashPlayerVersion","repos":[{"name":"swagatbora90/CheckFlashPlayerVersion","url":"https://github.com/swagatbora90/CheckFlashPlayerVersion","stars":0,"created":"2016-10-26"}]},"first":{"date":"2016-10-26","source":"PoC-in-GitHub","url":"https://github.com/swagatbora90/CheckFlashPlayerVersion"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1189"],"provenance":"source"}],"timeline":[{"date":"2016-10-21","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV 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KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 3660 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.59,"detail":"percentile 0.9793"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.16,"detail":"base score 8.8"},{"name":"End-of-life product","points":-15.0,"detail":"No patches exist; remove or isolate it"}]},"lineage":{"familyId":"fam-class-adobe-flash-player-cwe-416"}}