CVE-2025-21121

Code execution via malicious-file out-of-bounds write

Published Feb 11, 2025 · Updated Feb 12, 2025

Out-of-bounds write in Adobe InDesign ID20.0 and ID19.5.1 and earlier allows attackers to execute code via a malicious file. Adobe has not disclosed the affected file parser or the unchecked operation that writes beyond its intended memory boundary. Exploitation requires the victim to open the file, and resulting code runs with that user's privileges on Windows or macOS.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Adobe InDesign ID20.0 and ID19.5.1 and earlier allows attackers to execute code via a malicious file. Adobe has not disclosed the affected file parser or the unchecked operation that writes beyond its intended memory boundary. Exploitation requires the victim to open the file, and resulting code runs with that user's privileges on Windows or macOS.

The record

CVE
CVE-2025-21121
Published
Feb 11, 2025
Updated
Feb 12, 2025
Vendor
Adobe
Product
InDesign
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 2025Record 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 <=ID19.5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Adobe · InDesignversion=0 <=ID19.5.1

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

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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