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CVE-2026-34621— Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)

Quick assessment

Affected
Adobe Acrobat DC
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Adobe Acrobat Reader是美国奥多比（Adobe）公司的一款PDF查看器。该软件用于打印，签名和注释 PDF。 Adobe Acrobat Reader 24.001.30356版本、26.001.21367版本及之前版本存在安全漏洞，该漏洞源于对象原型属性修改不当，可能导致在当前用户环境中执行任意代码。

CVSS 8.6 · High KEV EPSS 2.18% · P82

Affected Version Matrix 6

VendorProduct Version RangeStatus
Adobe Acrobat 2024 ≤ 24.001.30356 affected
24.001.30362 (Win), 24.001.30360 (Mac) unaffected
Adobe Acrobat DC ≤ 26.001.21367 affected
26.001.21411 unaffected
Adobe Acrobat Reader DC ≤ 26.001.21367 affected
26.001.21411 unaffected
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I. Basic Information for CVE-2026-34621

Vulnerability Information
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Vulnerability Title
Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
Adobe Acrobat Reader 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Adobe Acrobat Reader是美国奥多比（Adobe）公司的一款PDF查看器。该软件用于打印，签名和注释 PDF。 Adobe Acrobat Reader 24.001.30356版本、26.001.21367版本及之前版本存在安全漏洞，该漏洞源于对象原型属性修改不当，可能导致在当前用户环境中执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Adobe Acrobat DC 0 ~ 26.001.21367 -
Adobe Acrobat Reader DC 0 ~ 26.001.21367 -
Adobe Acrobat 2024 0 ~ 24.001.30356 -

II. Public POCs for CVE-2026-34621

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III. Intelligence Information for CVE-2026-34621

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Vendor Advisories for CVE-2026-34621 (1)

IV. Related Vulnerabilities

Same product: Acrobat DC
Same vendor: Adobe
Same weakness: CWE-1321

V. Comments for CVE-2026-34621

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