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8.6
CVSS
High

CVE-2026-34621

PUBLISHED

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

1 day faster than CISA KEV

Exploited in the wild Low complexity
Vendor
Adobe
Product
Acrobat Reader
Published
Apr 11, 2026
EPSS
11.0% · 94% pctl

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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.

cisa

Weaknesses (CWE)

  • CWE-1321

    Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CVSS scores

CVSS v3.1 8.6 High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Exploitation status

Exploited in the wild

Recorded 2026-06-01 13:07:13 UTC · CVE

References

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source Added
CVE First 2026-06-01 13:07 UTC
CISA 2026-06-02 14:02 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel

  • KEV confirmed by CISA