{"cve":{"cve_id":"CVE-2026-34621","is_kev":true,"kev_date_added":"2026-04-13","kev_vendor_project":"Adobe","kev_product":"Acrobat and Reader","kev_vulnerability_name":"Adobe Acrobat and Reader Prototype Pollution Vulnerability","kev_short_description":"Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.","kev_required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","kev_due_date":"2026-04-27","kev_known_ransomware":false,"kev_notes":"https://helpx.adobe.com/security/products/acrobat/apsb26-43.html ; https://nvd.nist.gov/vuln/detail/CVE-2026-34621","kev_cwes":["CWE-1321"],"epss_score":0.07086,"epss_percentile":0.93737,"epss_as_of":"2026-08-26","description":"Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') 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.","published_at":"2026-04-11T06:45:43.512000Z","last_modified_at":null,"cvss_v3_score":8.6,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-1321"],"nvd_references":["https://helpx.adobe.com/security/products/acrobat/apsb26-43.html"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-29T23:46:59.033383Z"},"effective_severity":"HIGH","badges":["kev"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"adobe","vendor_name":"Adobe","product_slug":"acrobat-2024","product_name":"Acrobat 2024","version_start":"0","version_start_inclusive":true,"version_end":"24.001.30356","version_end_inclusive":true,"cpe23_uri":"cve5:adobe:acrobat-2024:0:24.001.30356"},{"vendor_slug":"adobe","vendor_name":"Adobe","product_slug":"acrobat-2024","product_name":"Acrobat 2024","version_start":"24.001.30362 (Win), 24.001.30360 (Mac)","version_start_inclusive":true,"version_end":"24.001.30362 (Win), 24.001.30360 (Mac)","version_end_inclusive":true,"cpe23_uri":"cve5:adobe:acrobat-2024:24.001.30362 (Win), 24.001.30360 (Mac):24.001.30362 (Win), 24.001.30360 (Mac)"},{"vendor_slug":"adobe","vendor_name":"Adobe","product_slug":"acrobat-dc","product_name":"Acrobat DC","version_start":"26.001.21411","version_start_inclusive":true,"version_end":"26.001.21411","version_end_inclusive":true,"cpe23_uri":"cve5:adobe:acrobat-dc:26.001.21411:26.001.21411"},{"vendor_slug":"adobe","vendor_name":"Adobe","product_slug":"acrobat-dc","product_name":"Acrobat DC","version_start":"0","version_start_inclusive":true,"version_end":"26.001.21367","version_end_inclusive":true,"cpe23_uri":"cve5:adobe:acrobat-dc:0:26.001.21367"},{"vendor_slug":"adobe","vendor_name":"Adobe","product_slug":"acrobat-reader","product_name":"Acrobat Reader","version_start":"0","version_start_inclusive":true,"version_end":"26.001.21367","version_end_inclusive":true,"cpe23_uri":"cve5:adobe:acrobat-reader:0:26.001.21367"},{"vendor_slug":"adobe","vendor_name":"Adobe","product_slug":"acrobat-reader-dc","product_name":"Acrobat Reader DC","version_start":"0","version_start_inclusive":true,"version_end":"26.001.21367","version_end_inclusive":true,"cpe23_uri":"cve5:adobe:acrobat-reader-dc:0:26.001.21367"},{"vendor_slug":"adobe","vendor_name":"Adobe","product_slug":"acrobat-reader-dc","product_name":"Acrobat Reader DC","version_start":"26.001.21411","version_start_inclusive":true,"version_end":"26.001.21411","version_end_inclusive":true,"cpe23_uri":"cve5:adobe:acrobat-reader-dc:26.001.21411:26.001.21411"}],"exploit_refs":[],"news":[],"references":[{"url":"https://helpx.adobe.com/security/products/acrobat/apsb26-43.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-04-11T06:45:43.512000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2026-04-13T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"cvss_changed","at":"2026-06-28T17:53:26.161903Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:26.161903Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:53:26.161903Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"}]}