{"cveID":"CVE-2021-21017","vendorProject":"Adobe","product":"Acrobat and Reader","vulnerabilityName":"Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability","dateAdded":"2021-11-03","shortDescription":"Acrobat Acrobat and Reader contain a heap-based buffer overflow vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Unknown","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-21017","cwes":["CWE-122"],"year":2021,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2021-21017","technique":"T1204.002","technique_name_at_mapping":"Malicious File","mapping_type":"exploitation_technique","capability_group":"buffer_overflow","comments":"This exploit requires a user to open a malicious file. It can then result in execution of arbitrary code which could have any number of impacts.","references":["https://helpx.adobe.com/security/products/acrobat/apsb21-09.html"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1204.002","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Malicious File","name_at_mapping":"Malicious File","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":39,"has_detection_strategy":true}],"mapping_types":["exploitation_technique"],"has_exploitation_technique":true,"mapping_attack_versions":["16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":[],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}