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CVE-2026-34702 Adobe CVE debrief

CVE-2026-34702 is a Stack-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, requiring user interaction to open a malicious file. The CVSS score for this vulnerability is 7.8, classified as HIGH.

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 patches to mitigate this vulnerability.

Technical summary

The vulnerability is caused by a Stack-based Buffer Overflow, which can be exploited when a victim opens a malicious file. This issue has been addressed in later versions of Adobe InDesign.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches from Adobe as described in their security bulletin [ref-4].

Evidence notes

CVE-2026-34702 was published on [cvePublishedAt] and modified on [cveModifiedAt].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34702 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34702

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

  • CVE-2026-34702 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34702

    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.