EUVD-2026-35777
GHSA-rp93-mmx2-chm6
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionCVE.org
InDesign Desktop versions 21.3, 20.5.3 and earlier are affected by a Heap-based Buffer Overflow vulnerability that 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.
AnalysisAI
Arbitrary code execution in Adobe InDesign Desktop versions 21.3, 20.5.3 and earlier is possible when a user opens a maliciously crafted document, triggering a heap-based buffer overflow. The flaw runs code in the context of the logged-in user and was reported by Adobe; no public exploit identified at time of analysis and EPSS data is not provided.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to manually open a maliciously crafted InDesign document (INDD/INDT/IDML or related supported file) in a vulnerable build of InDesign Desktop 21.3, 20.5.3 or earlier; the CVSS vector AV:L/UI:R confirms local attack vector with required user interaction. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H yields a base score of 7.8 (High) and reflects a classic client-side file-open exploitation profile: local attack vector with required user interaction but no privileges, leading to full confidentiality, integrity and availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker emails a designer a malicious InDesign document (e.g., a fake brand-style template or vendor-supplied IDML) and entices them to open it; upon parsing, the heap-based buffer overflow triggers and shellcode executes as the logged-in user, giving the attacker the same access to documents, network shares and saved credentials as the victim. No public exploit identified at time of analysis, so the realistic near-term threat is targeted spear-phishing against creative and publishing teams rather than mass campaigns. |
| Remediation | Apply the vendor-released patch by updating Adobe InDesign Desktop to the fixed version listed in Adobe Security Bulletin APSB26-58 (https://helpx.adobe.com/security/products/indesign/apsb26-58.html) using the Creative Cloud desktop application or enterprise admin console; the bulletin enumerates exact fixed builds for InDesign 2025 (20.x) and 2026 (21.x) tracks. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all InDesign installations and identify systems running versions 21.3, 20.5.3, or earlier; implement intake controls restricting document opening to verified trusted sources only. …
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