Is CVE-2026-21275 in the CISA KEV catalog?

No. CVE-2026-21275 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-21275?

CVE-2026-21275 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2026-21275?

CVE-2026-21275 has an EPSS score of 0.22% (12th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-21275?

Upgrade indesign to 21.1 or later.

CVE & CISA-KEV Catalog

CVE-2026-21275

HIGH

7.8

CVSS v3

NVD

Description

InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an Access of Uninitialized Pointer 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.

CWE-824

How to fix

Remediation Available

indesignNVD

Affected:>= 21.0, < 21.1Fixed in:21.1CVE-2026-21275derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.22%probability of exploitation in 30 days

12thpercentile

Low risk: more likely to be exploited than 12% of all known CVEs.

References

Vendor Advisory1

helpx.adobe.com

Embed a live status badge for CVE-2026-21275

Markdown

[![CVE-2026-21275](https://tridentstack.com/cve/badge/CVE-2026-21275.svg)](https://tridentstack.com/cve/CVE-2026-21275)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-21275"><img src="https://tridentstack.com/cve/badge/CVE-2026-21275.svg" alt="CVE-2026-21275"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-14.