CVE-2026-34621
Full vulnerability record from the local CVENow database.
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.
Severity
HIGH
CVSS score
8.6
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-11 07:16:03.633000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
"id": "CVE-2026-34621",
"sourceIdentifier": "[email protected]",
"published": "2026-04-11T07:16:03.633",
"lastModified": "2026-10-26T21:10:00.170",
"vulnStatus": "Analyzed",
"cveTags": [],
"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."
},
{
"lang": "es",
"value": "Las versiones de Acrobat Reader 24.001.30356, 26.001.21367 y anteriores están afectadas por una vulnerabilidad de Modificación de Atributos de Prototipo de Objeto Controlada Incorrectamente (’Prototype Pollution’) que podría resultar en ejecución de código arbitrario en el contexto del usuario actual. La explotación de este problema requiere interacción del usuario, ya que la víctima debe abrir un archivo malicioso."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Adobe",
"product": "Acrobat DC",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"lessThanOrEqual": "26.001.21367",
"versionType": "custom",
"status": "affected"
},
{
"version": "26.001.21411",
"versionType": "custom",
"status": "unaffected"
}
]
},
{
"vendor": "Adobe",
"product": "Acrobat Reader DC",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"lessThanOrEqual": "26.001.21367",
"versionType": "custom",
"status": "affected"
},
{
"version": "26.001.21411",
"versionType": "custom",
"status": "unaffected"
}
]
},
{
"vendor": "Adobe",
"product": "Acrobat 2024",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0",
"lessThanOrEqual": "24.001.30356",
"versionType": "custom",
"status": "affected"
},
{
"version": "24.001.30362 (Win), 24.001.30360 (Mac)",
"versionType": "custom",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 6.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-04-11T00:00:00+00:00",
"id": "CVE-2026-34621",
"options": [
{
"exploitation": "active"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"cisaExploitAdd": "2026-04-13",
"cisaActionDue": "2026-04-27",
"cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "Adobe Acrobat and Reader Prototype Pollution Vulnerability",
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-1321"
}
]
}
],
"configurations": [
{
"operator": "AND",
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*",
"versionEndExcluding": "26.001.21411",
"matchCriteriaId": "C1D9FFF0-C948-4C17-8E0C-9245DD3ADDCB"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*",
"versionEndExcluding": "26.001.21411",
"matchCriteriaId": "6E91BACA-4DE1-4412-BE17-0992FDEEC66B"
}
]
},
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": false,
"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
"matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"
},
{
"vulnerable": false,
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"
}
]
}
]
},
{
"operator": "AND",
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*",
"versionStartIncluding": "24.0.0",
"versionEndExcluding": "24.001.30362",
"matchCriteriaId": "0287242D-1301-49AF-B416-C37114304EF4"
}
]
},
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": false,
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"
}
]
}
]
},
{
"operator": "AND",
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*",
"versionStartIncluding": "24.0.0",
"versionEndExcluding": "24.001.30360",
"matchCriteriaId": "528A400D-E038-41E4-B3C8-ED5BA10BD63E"
}
]
},
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": false,
"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
"matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"
}
]
}
]
}
],
"references": [
{
"url": "https://helpx.adobe.com/security/products/acrobat/apsb26-43.html",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
},
{
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34621",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
]
}
]
}