CVE-2026-27287: InCopy versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds read vulnerability when parsing a cr

Routine

HIGH 7.8UPGRADE

CVE-2026-27287 is a high-severity flaw (CVSS 7.8) affecting incopy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

InCopy versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds read vulnerability when parsing a crafted file, which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code 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	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-04-14
Last modified	2026-08-28

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

Last updated 2026-08-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 21:16 UTCPublished CVE record published
2026-08-28 00:17 UTCUpdated Record last modified

adobe incopy 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 incopy || rpm -q incopy || incopy --version

2. UPGRADE to 20.5.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade incopy

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 incopy sudo apt install incopy=<VERSION_BEFORE_21.0> sudo apt-mark hold incopy

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

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

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-2026-27287?

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

Is CVE-2026-27287 being exploited?

CVE-2026-27287 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-2026-27287 affect?

CVE-2026-27287 affects incopy. Severity is high (CVSS 7.8). InCopy versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds read vulnerability when parsing a crafted file, which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerabil

How urgent is CVE-2026-27287?

Priority 30/100. High severity

Related CVEs

CVE-2026-34631 HIGH 7.8 UPGRADE InCopy versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds write vulnerability that could resul

References

← Back to latest CVEs