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PatchSiren cyber security CVE debrief

CVE-2026-47921 Adobe CVE debrief

CVE-2026-47921 is a HIGH severity Use After Free vulnerability in Adobe Acrobat Reader versions 24.001.30365, 26.001.21651 and earlier. This vulnerability 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.

Vendor
Adobe
Product
Acrobat Reader
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-08-28
Advisory published
2026-06-09
Advisory updated
2026-08-28

Who should care

Users of Adobe Acrobat Reader versions 24.001.30365, 26.001.21651 and earlier should apply the necessary updates to prevent exploitation of this vulnerability.

Technical summary

The vulnerability is caused by a Use After Free issue in Adobe Acrobat Reader. This could allow an attacker to execute arbitrary code in the context of the current user if a victim opens a malicious file.

Defensive priority

HIGH

Recommended defensive actions

  • Apply the necessary updates as recommended by Adobe.
  • Be cautious when opening files from unknown sources.

Evidence notes

The CVE-2026-47921 vulnerability has been documented by Adobe and NIST. For more information, see resourceLinkAnnotations with linkId values 'cve-org', 'nvd', and 'ref-4'.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47921 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47921

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

  • CVE-2026-47921 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47921

    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.