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CVE-2026-34698 Adobe CVE debrief

CVE-2026-34698 is a Heap-based Buffer Overflow vulnerability affecting Adobe InDesign versions 21.3, 20.5.3, and earlier. This vulnerability could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction, as a victim must open a malicious file. The CVSS score for this vulnerability is 7.8, indicating a HIGH severity level.

Vendor
Adobe
Product
InDesign Desktop
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 InDesign versions 21.3, 20.5.3, and earlier should apply the necessary updates or mitigations to prevent exploitation of this vulnerability.

Technical summary

The vulnerability is caused by a Heap-based Buffer Overflow in Adobe InDesign. This type of vulnerability occurs when more data is written to a buffer than it is designed to hold, causing the extra data to spill over into adjacent areas of memory. In this case, the vulnerability could allow an attacker to execute arbitrary code in the context of the current user.

Defensive priority

High

Recommended defensive actions

  • Apply the latest updates from Adobe to vulnerable InDesign versions.
  • Be cautious when opening files from untrusted sources.

Evidence notes

CVE-2026-34698 was published on [cve-org] and detailed further on [nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34698 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34698

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

  • CVE-2026-34698 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34698

    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.