{"history":[{"alert":0,"cve":"CVE-2026-34621","id":23304,"kind":"epss","observed_at":1794500401,"payload":"{\"date\": \"2026-11-12\", \"epss\": 0.0734, \"percentile\": 0.94478}"},{"alert":0,"cve":"CVE-2026-34621","id":20784,"kind":"epss","observed_at":1794327601,"payload":"{\"date\": \"2026-11-10\", \"epss\": 0.0734, \"percentile\": 0.94443}"},{"alert":0,"cve":"CVE-2026-34621","id":18625,"kind":"epss","observed_at":1794241201,"payload":"{\"date\": \"2026-11-09\", \"epss\": 0.0734, \"percentile\": 0.94437}"},{"alert":0,"cve":"CVE-2026-34621","id":16696,"kind":"epss","observed_at":1794154800,"payload":"{\"date\": \"2026-11-08\", \"epss\": 0.0734, \"percentile\": 0.94434}"},{"alert":0,"cve":"CVE-2026-34621","id":14674,"kind":"epss","observed_at":1794068402,"payload":"{\"date\": \"2026-11-07\", \"epss\": 0.0723, \"percentile\": 0.94361}"},{"alert":0,"cve":"CVE-2026-34621","id":12460,"kind":"epss","observed_at":1793982001,"payload":"{\"date\": \"2026-11-06\", \"epss\": 0.0723, \"percentile\": 0.94352}"},{"alert":0,"cve":"CVE-2026-34621","id":10444,"kind":"epss","observed_at":1793938800,"payload":"{\"date\": \"2026-11-05\", \"epss\": 0.0723, \"percentile\": 0.94348}"},{"alert":0,"cve":"CVE-2026-34621","id":7994,"kind":"epss","observed_at":1793809200,"payload":"{\"date\": \"2026-11-04\", \"epss\": 0.0723, \"percentile\": 0.94344}"},{"alert":0,"cve":"CVE-2026-34621","id":5773,"kind":"epss","observed_at":1793722800,"payload":"{\"date\": \"2026-11-03\", \"epss\": 0.0723, \"percentile\": 0.94334}"},{"alert":1,"cve":"CVE-2026-34621","id":3865,"kind":"cna","observed_at":1793701200,"payload":"{\"containers\": {\"adp\": [{\"metrics\": [{\"other\": {\"content\": {\"id\": \"CVE-2026-34621\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"role\": \"CISA Coordinator\", \"timestamp\": \"2026-04-11T00:00:00+00:00\", \"version\": \"2.0.3\"}, \"type\": \"ssvc\"}}, {\"other\": {\"content\": {\"dateAdded\": \"2026-04-13\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621\"}, \"type\": \"kev\"}}], \"providerMetadata\": {\"dateUpdated\": \"2026-04-14T03:55:27.955Z\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\"}, \"references\": [{\"tags\": [\"government-resource\"], \"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-04-13T00:00:00.000Z\", \"value\": \"CVE-2026-34621 added to CISA KEV\"}], \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"affected\": [{\"defaultStatus\": \"unaffected\", \"product\": \"Acrobat DC\", \"vendor\": \"Adobe\", \"versions\": [{\"lessThanOrEqual\": \"26.001.21367\", \"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"26.001.21411\", \"versionType\": \"custom\"}]}, {\"defaultStatus\": \"unaffected\", \"product\": \"Acrobat Reader DC\", \"vendor\": \"Adobe\", \"versions\": [{\"lessThanOrEqual\": \"26.001.21367\", \"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"26.001.21411\", \"versionType\": \"custom\"}]}, {\"defaultStatus\": \"unaffected\", \"product\": \"Acrobat 2024\", \"vendor\": \"Adobe\", \"versions\": [{\"lessThanOrEqual\": \"24.001.30356\", \"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"24.001.30362 (Win), 24.001.30360 (Mac)\", \"versionType\": \"custom\"}]}], \"datePublic\": \"2026-04-10T17:00:00.000Z\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"LOCAL\", \"availabilityImpact\": \"HIGH\", \"availabilityRequirement\": \"NOT_DEFINED\", \"baseScore\": 8.6, \"baseSeverity\": \"HIGH\", \"confidentialityImpact\": \"HIGH\", \"confidentialityRequirement\": \"NOT_DEFINED\", \"environmentalScore\": 8.6, \"environmentalSeverity\": \"HIGH\", \"exploitCodeMaturity\": \"NOT_DEFINED\", \"integrityImpact\": \"HIGH\", \"integrityRequirement\": \"NOT_DEFINED\", \"modifiedAttackComplexity\": \"LOW\", \"modifiedAttackVector\": \"LOCAL\", \"modifiedAvailabilityImpact\": \"HIGH\", \"modifiedConfidentialityImpact\": \"HIGH\", \"modifiedIntegrityImpact\": \"HIGH\", \"modifiedPrivilegesRequired\": \"NONE\", \"modifiedScope\": \"CHANGED\", \"modifiedUserInteraction\": \"REQUIRED\", \"privilegesRequired\": \"NONE\", \"remediationLevel\": \"NOT_DEFINED\", \"reportConfidence\": \"NOT_DEFINED\", \"scope\": \"CHANGED\", \"temporalScore\": 8.6, \"temporalSeverity\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H\", \"version\": \"3.1\"}, \"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-1321\", \"description\": \"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2026-08-27T22:15:48.961Z\", \"orgId\": \"078d4453-3bcd-4900-85e6-15281da43538\", \"shortName\": \"adobe\"}, \"references\": [{\"tags\": [\"vendor-advisory\"], \"url\": \"https://helpx.adobe.com/security/products/acrobat/apsb26-43.html\"}], \"source\": {\"discovery\": \"EXTERNAL\"}, \"title\": \"Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)\", \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}}}, \"cveMetadata\": {\"assignerOrgId\": \"078d4453-3bcd-4900-85e6-15281da43538\", \"assignerShortName\": \"adobe\", \"cveId\": \"CVE-2026-34621\", \"datePublished\": \"2026-04-11T06:45:43.512Z\", \"dateReserved\": \"2026-03-30T17:30:36.490Z\", \"dateUpdated\": \"2026-08-27T22:15:48.961Z\", \"state\": \"PUBLISHED\"}, \"dataType\": \"CVE_RECORD\", \"dataVersion\": \"5.2\"}"},{"alert":0,"cve":"CVE-2026-34621","id":3617,"kind":"epss","observed_at":1793665375,"payload":"{\"date\": \"2026-11-02\", \"epss\": 0.0723, \"percentile\": 0.94327}"},{"alert":1,"cve":"CVE-2026-34621","id":207,"kind":"kev","observed_at":1793665375,"payload":"{\"cveID\": \"CVE-2026-34621\", \"cwes\": [\"CWE-1321\"], \"dateAdded\": \"2026-04-13\", \"dueDate\": \"2026-04-27\", \"forensicTriage\": \"No\", \"knownRansomwareCampaignUse\": \"Unknown\", \"notes\": \"https://helpx.adobe.com/security/products/acrobat/apsb26-43.html ; https://nvd.nist.gov/vuln/detail/CVE-2026-34621\", \"product\": \"Acrobat and Reader\", \"requiredAction\": \"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\", \"shortDescription\": \"Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.\", \"vendorProject\": \"Adobe\", \"vulnerabilityName\": \"Adobe Acrobat and Reader Prototype Pollution Vulnerability\"}"}],"record":{"affected":[{"defaultStatus":"unaffected","product":"Acrobat DC","vendor":"Adobe","versions":[{"lessThanOrEqual":"26.001.21367","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"26.001.21411","versionType":"custom"}]},{"defaultStatus":"unaffected","product":"Acrobat Reader DC","vendor":"Adobe","versions":[{"lessThanOrEqual":"26.001.21367","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"26.001.21411","versionType":"custom"}]},{"defaultStatus":"unaffected","product":"Acrobat 2024","vendor":"Adobe","versions":[{"lessThanOrEqual":"24.001.30356","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"24.001.30362 (Win), 24.001.30360 (Mac)","versionType":"custom"}]}],"cna":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-34621","options":[{"Exploitation":"active"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-04-11T00:00:00+00:00","version":"2.0.3"},"type":"ssvc"}},{"other":{"content":{"dateAdded":"2026-04-13","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621"},"type":"kev"}}],"providerMetadata":{"dateUpdated":"2026-04-14T03:55:27.955Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621"}],"timeline":[{"lang":"en","time":"2026-04-13T00:00:00.000Z","value":"CVE-2026-34621 added to CISA KEV"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Acrobat DC","vendor":"Adobe","versions":[{"lessThanOrEqual":"26.001.21367","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"26.001.21411","versionType":"custom"}]},{"defaultStatus":"unaffected","product":"Acrobat Reader DC","vendor":"Adobe","versions":[{"lessThanOrEqual":"26.001.21367","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"26.001.21411","versionType":"custom"}]},{"defaultStatus":"unaffected","product":"Acrobat 2024","vendor":"Adobe","versions":[{"lessThanOrEqual":"24.001.30356","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"24.001.30362 (Win), 24.001.30360 (Mac)","versionType":"custom"}]}],"datePublic":"2026-04-10T17:00:00.000Z","descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","availabilityRequirement":"NOT_DEFINED","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","confidentialityRequirement":"NOT_DEFINED","environmentalScore":8.6,"environmentalSeverity":"HIGH","exploitCodeMaturity":"NOT_DEFINED","integrityImpact":"HIGH","integrityRequirement":"NOT_DEFINED","modifiedAttackComplexity":"LOW","modifiedAttackVector":"LOCAL","modifiedAvailabilityImpact":"HIGH","modifiedConfidentialityImpact":"HIGH","modifiedIntegrityImpact":"HIGH","modifiedPrivilegesRequired":"NONE","modifiedScope":"CHANGED","modifiedUserInteraction":"REQUIRED","privilegesRequired":"NONE","remediationLevel":"NOT_DEFINED","reportConfidence":"NOT_DEFINED","scope":"CHANGED","temporalScore":8.6,"temporalSeverity":"HIGH","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","description":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-27T22:15:48.961Z","orgId":"078d4453-3bcd-4900-85e6-15281da43538","shortName":"adobe"},"references":[{"tags":["vendor-advisory"],"url":"https://helpx.adobe.com/security/products/acrobat/apsb26-43.html"}],"source":{"discovery":"EXTERNAL"},"title":"Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"078d4453-3bcd-4900-85e6-15281da43538","assignerShortName":"adobe","cveId":"CVE-2026-34621","datePublished":"2026-04-11T06:45:43.512Z","dateReserved":"2026-03-30T17:30:36.490Z","dateUpdated":"2026-08-27T22:15:48.961Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"cna_checked":1794133200,"cve":"CVE-2026-34621","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.","epss":{"date":"2026-11-12","epss":0.0734,"percentile":0.94478},"epss_checked":1794522003,"first_seen":1793665375,"kev":{"cveID":"CVE-2026-34621","cwes":["CWE-1321"],"dateAdded":"2026-04-13","dueDate":"2026-04-27","forensicTriage":"No","knownRansomwareCampaignUse":"Unknown","notes":"https://helpx.adobe.com/security/products/acrobat/apsb26-43.html ; https://nvd.nist.gov/vuln/detail/CVE-2026-34621","product":"Acrobat and Reader","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.","vendorProject":"Adobe","vulnerabilityName":"Adobe Acrobat and Reader Prototype Pollution Vulnerability"},"kev_checked":1794522003,"products":"Adobe Acrobat DC, Adobe Acrobat Reader DC, Adobe Acrobat 2024","references":["https://helpx.adobe.com/security/products/acrobat/apsb26-43.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621"],"score":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","availabilityRequirement":"NOT_DEFINED","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","confidentialityRequirement":"NOT_DEFINED","environmentalScore":8.6,"environmentalSeverity":"HIGH","exploitCodeMaturity":"NOT_DEFINED","integrityImpact":"HIGH","integrityRequirement":"NOT_DEFINED","modifiedAttackComplexity":"LOW","modifiedAttackVector":"LOCAL","modifiedAvailabilityImpact":"HIGH","modifiedConfidentialityImpact":"HIGH","modifiedIntegrityImpact":"HIGH","modifiedPrivilegesRequired":"NONE","modifiedScope":"CHANGED","modifiedUserInteraction":"REQUIRED","privilegesRequired":"NONE","provider":"adobe","remediationLevel":"NOT_DEFINED","reportConfidence":"NOT_DEFINED","scope":"CHANGED","temporalScore":8.6,"temporalSeverity":"HIGH","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"solutions":"","state":"PUBLISHED","title":"Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)","updated_at":1794500401,"workarounds":""},"sources":[]}