CVE-2026-27286: InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by a Heap-based Buffer Overflow vulnerability

Routine

MEDIUM 5.5UPGRADE

CVE-2026-27286 is a medium-severity flaw (CVSS 5.5) 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 a Heap-based Buffer Overflow vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to disclose sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-122
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 22:10 UTCUpdated Record last modified

adobe indesign UPGRADE

Affected: < 20.5.3 · >= 21.0 and <= 21.3

Fixed in: 20.5.3

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-2026-27286?

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

Is CVE-2026-27286 being exploited?

CVE-2026-27286 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-2026-27286 affect?

CVE-2026-27286 affects indesign. Severity is medium (CVSS 5.5). InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to disclose sensitive information stored in memo

How urgent is CVE-2026-27286?

Priority 20/100. No elevated risk signals yet.

Related CVEs

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CVE-2026-27238 HIGH 7.8 UPGRADE InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by a Heap-based Buffer Overflow vulnerability
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-2026-27291 HIGH 7.8 UPGRADE InDesign Desktop versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds write vulnerability that c
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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