CVE-2026-34698

Code execution via malicious file heap overflow

Published Jun 9, 2026 · Updated Jun 9, 2026

Heap-based buffer overflow in Adobe InDesign 21.3 and earlier and 20.5.3 and earlier allows attackers to execute code through a malicious file. Adobe discloses no affected parser, file format, or specific memory-copy operation, so the precise code locus and unchecked input operation remain undisclosed. Exploitation requires a user to open the file, after which code runs in the context of that user on Windows or macOS.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Adobe InDesign 21.3 and earlier and 20.5.3 and earlier allows attackers to execute code through a malicious file. Adobe discloses no affected parser, file format, or specific memory-copy operation, so the precise code locus and unchecked input operation remain undisclosed. Exploitation requires a user to open the file, after which code runs in the context of that user on Windows or macOS.

The record

CVE
CVE-2026-34698
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Adobe
Product
Adobe InDesign
Classifications
CWE-122, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=20.5.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · Adobe InDesignversion=0 <=20.5.3

Published CVSS scores

7.8AdobeCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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