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CVE-2026-34622 Adobe CVE debrief

The CVE-2026-34622 vulnerability affects Adobe Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362, and earlier. It is caused by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability, which 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. Organizations should review their deployments and apply necessary patches or mitigations. The vulnerability has a HIGH CVSS score of 8.6, indicating a high severity level. Users of affected versions should prioritize patching or mitigating this vulnerability.

Vendor
Adobe
Product
Acrobat DC
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-14
Original CVE updated
2026-08-28
Advisory published
2026-04-14
Advisory updated
2026-08-28

Who should care

Organizations and individuals using Adobe Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362, and earlier should be aware of this vulnerability and take necessary actions to mitigate the risk. This includes reviewing their deployments, applying patches or updates, and monitoring for suspicious user interactions. IT teams, security teams, and individuals responsible for managing software deployments should prioritize patching or mitigating this vulnerability.

Technical summary

The CVE-2026-34622 vulnerability affects Adobe Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362, and earlier. It is caused by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability, which 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 vulnerability has a HIGH CVSS score of 8.6, indicating a high severity level.

Defensive priority

High priority due to the HIGH CVSS score of 8.6 and the potential for arbitrary code execution.

Recommended defensive actions

  • Inventory and verify affected Adobe Acrobat Reader versions
  • Apply vendor patches or updates
  • Monitor for suspicious user interactions
  • Implement compensating controls for file handling
  • Retest and validate vulnerability fixes
  • Review and update incident response plans
  • Conduct vulnerability scanning and asset inventory

Evidence notes

The CVE-2026-34622 vulnerability affects Adobe Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362, and earlier. It is caused by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability. Exploitation requires user interaction. Evidence of exploitation is limited, and defenders should verify affected deployments and apply patches or mitigations. The CVE record was published on 2026-04-14T17:16:51.110Z and has not been modified since then.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34622 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34622

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-34622 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34622

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.