CVE & CISA-KEV Catalog

CVE-2026-34621

HIGHCISA KEVEPSS 94th pctl
8.6
CVSS v3
NVD

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.

CWE-1321

How to fix

Remediation Available
Adobe Acrobat 2020Windows application
Affected:24.0.0 24.001.30362Fixed in:24.001.30362
Affected:24.0.0 24.001.30360Fixed in:24.001.30360
Adobe Acrobat ProWindows application
Affected:24.0.0 24.001.30360Fixed in:24.001.30360
Affected:24.0.0 24.001.30362Fixed in:24.001.30362
Adobe Acrobat Reader (32-bit)Windows application
Affected:26.001.21411Fixed in:26.001.21411
Adobe Acrobat Reader (64-bit)Windows application
Affected:26.001.21411Fixed in:26.001.21411

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

7.09%probability of exploitation in 30 days
94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-04-27

References

Vendor Advisory1
Government Resource1

Related Vulnerabilities

Other CWE-1321 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2019-0230Critical9.897%--
CVE-2019-11358Medium6.187%-Fix
CVE-2020-7774High7.369%-Fix
CVE-2022-24760Critical10.049%-Fix
CVE-2022-39396Critical9.839%-Fix
CVE-2022-2564Critical9.833%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-13.