CVE-2026-27291: InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds write vulnerability that c

Routine

HIGH 7.8UPGRADE

CVE-2026-27291 is a high-severity flaw (CVSS 7.8) affecting indesign. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds write 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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-14
Last modified	2026-10-26

Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 17:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

adobe indesign UPGRADE

Affected: < 20.5.3 · >= 21.0 and < 21.3

Fixed in: 20.5.3, 21.3

Safe to downgrade to: a release before 21.0

1. Check installed version

apt-cache policy indesign || rpm -q indesign || indesign --version

2. UPGRADE to 20.5.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade indesign

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade indesign

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 21.0 (Debian / Ubuntu)

apt-cache madison indesign sudo apt install indesign=<VERSION_BEFORE_21.0> sudo apt-mark hold indesign

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list indesign sudo dnf downgrade indesign-<VERSION_BEFORE_21.0> sudo dnf versionlock add indesign

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27291?

indesign: upgrade to 20.5.3, 21.3. Exact commands for each OS are on this page.

Is CVE-2026-27291 being exploited?

CVE-2026-27291 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27291 affect?

CVE-2026-27291 affects indesign. Severity is high (CVSS 7.8). InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction i

How urgent is CVE-2026-27291?

Priority 28/100. High severity

Related CVEs

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CVE-2026-27284 HIGH 7.8 UPGRADE InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds read vulnerability when pa
CVE-2026-27285 MEDIUM 5.5 UPGRADE InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by a Heap-based Buffer Overflow vulnerability

References

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