CVE-2026-34621 | Adobe Acrobat Reader up to 24.001.30356/26.001.21367 File prototype pollution (apsb26-43)

VDB-356962 · CVE-2026-34621 · APSB26-43 ADOBE ACROBAT READER UP TO 24.001.30356/26.001.21367 FILE PROTOTYPE POLLUTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.8 $5k-$25k 0.99 Summaryinfo A vulnerability was found in Adobe Acrobat Reader up to 24.001.30356/26.001.21367 and classified as critical. Affected by this issue is some unknown functionality of the component File Handler. Executing a manipulation can lead to prototype pollution. This vulnerability is tracked as CVE-2026-34621. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component. Detailsinfo A vulnerability has been found in Adobe Acrobat Reader up to 24.001.30356/26.001.21367 and classified as critical. This vulnerability affects an unknown code of the component File Handler. The manipulation with an unknown input leads to a prototype pollution vulnerability. The CWE definition for the vulnerability is CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: 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. The advisory is available at helpx.adobe.com. This vulnerability was named CVE-2026-34621 since 03/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 04/11/2026). This vulnerability is assigned to T1059 by the MITRE ATT&CK project. Upgrading eliminates this vulnerability. Productinfo Type Document Reader Software Vendor Adobe Name Acrobat Reader Version 24.001.30356 26.001.21367 License free Website Vendor: https://www.adobe.com/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.9 VulDB Meta Temp Score: 7.8 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 9.6 CNA Vector (adobe): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Prototype pollution CWE: CWE-1321 / CWE-94 / CWE-74 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/30/2026 CVE reserved 04/11/2026 +12 days Advisory disclosed 04/11/2026 +0 days VulDB entry created 04/11/2026 +0 days VulDB entry last update Sourcesinfo Vendor: adobe.com Advisory: apsb26-43 Status: Confirmed CVE: CVE-2026-34621 (🔒) GCVE (CVE): GCVE-0-2026-34621 GCVE (VulDB): GCVE-100-356962 Entryinfo Created: 04/11/2026 09:13 Changes: 04/11/2026 09:13 (64) Complete: 🔍 Cache ID: 99:B73:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸