CVE-2026-34663: Illustrator versions 29.8.6, 30.3 and earlier are affected by an out-of-bounds read vulnerability that could l

Routine

MEDIUM 5.5UPGRADE

CVE-2026-34663 is a medium-severity flaw (CVSS 5.5) affecting illustrator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Illustrator versions 29.8.6, 30.3 and earlier are affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. 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 93%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-05-12
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

2026-05-12 18:17 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

adobe illustrator UPGRADE

Affected: >= 29.0 and < 29.8.7 · >= 30.0 and < 30.4

Fixed in: 29.8.7, 30.4

Safe to downgrade to: a release before 29.0

1. Check installed version

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

2. UPGRADE to 29.8.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade illustrator

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 29.0 (Debian / Ubuntu)

apt-cache madison illustrator sudo apt install illustrator=<VERSION_BEFORE_29.0> sudo apt-mark hold illustrator

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

dnf --showduplicates list illustrator sudo dnf downgrade illustrator-<VERSION_BEFORE_29.0> sudo dnf versionlock add illustrator

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-2026-34663?

illustrator: upgrade to 29.8.7, 30.4. Exact commands for each OS are on this page.

Is CVE-2026-34663 being exploited?

CVE-2026-34663 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-2026-34663 affect?

CVE-2026-34663 affects illustrator. Severity is medium (CVSS 5.5). Illustrator versions 29.8.6, 30.3 and earlier are affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitati

How urgent is CVE-2026-34663?

Priority 21/100. No elevated risk signals yet.

Related CVEs

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CVE-2026-34662 MEDIUM 5.5 UPGRADE Illustrator versions 29.8.6, 30.3 and earlier are affected by a NULL Pointer Dereference vulnerability that co
CVE-2026-34661 HIGH 7.8 UPGRADE Illustrator versions 29.8.6, 30.3 and earlier are affected by an out-of-bounds write vulnerability that could
CVE-2026-75990 HIGH 8.6 UPGRADE Illustrator is affected by an Incorrect Authorization vulnerability that could result in arbitrary code execut
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References

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