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CVE-2026-34703 Adobe CVE debrief

CVE-2026-34703 is a NULL Pointer Dereference vulnerability affecting Adobe InDesign versions 21.3, 20.5.3, and earlier. This vulnerability could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Vendor
Adobe
Product
InDesign Desktop
CVSS
MEDIUM 5.5
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 InDesign versions 21.3, 20.5.3, and earlier should apply the necessary updates to mitigate this vulnerability.

Technical summary

The vulnerability is caused by a NULL Pointer Dereference in Adobe InDesign. The CVSS score for this vulnerability is 5.5, with a severity rating of MEDIUM.

Defensive priority

MEDIUM

Recommended defensive actions

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

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Adobe's vendor advisory is available at [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34703 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34703

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

  • CVE-2026-34703 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34703

    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.