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CVE Record

CVE-2026-34663: Illustrator | Out-of-bounds Read (CWE-125)

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.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Adobe Illustrator can reveal sensitive memory when a user opens a specially crafted file. The issue does not allow direct remote compromise according to the supplied CVSS assessment, but exposed memory could contain confidential information. User interaction is required, reducing urgency compared with remotely exploitable flaws.

Executive priority

Prioritize normal security patching, with faster action for teams frequently handling external design files or sensitive information. This is not an emergency-level issue based on the supplied evidence, but delayed remediation preserves a realistic confidentiality risk.

Technical view

CVE-2026-34663 is a CWE-125 out-of-bounds read affecting Illustrator Desktop 2026 version 30.3 and earlier and Illustrator Desktop 2025 version 29.8.6 and earlier. It has CVSS 3.1 score 5.5, with high confidentiality impact but no stated integrity or availability impact.

Likely exposure

Organizations using affected Illustrator versions are exposed when users can receive and open untrusted Illustrator-compatible files. Creative, marketing, publishing, and design teams are the most likely populations. Systems already running 30.4 or 29.8.7 are outside the stated affected ranges.

Exploitation context

Exploitation requires a victim to open a malicious file locally. The supplied sources do not report active exploitation, and the CVE is not listed as KEV in the bundle. No privileges are required, but successful exploitation is limited to information disclosure.

Researcher notes

The CVSS vector is AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. The supplied material identifies an out-of-bounds read and malicious-file requirement but provides no affected file format, vulnerable component, memory contents, or technical root-cause detail. Those points should remain unasserted without additional vendor evidence.

Mitigation direction

  • Update Illustrator Desktop 2026 to version 30.4 or later.
  • Update Illustrator Desktop 2025 to version 29.8.7 or later.
  • Follow Adobe's advisory for current release and deployment guidance.
  • Limit opening Illustrator files from unknown or untrusted sources until updates are complete.

Validation and detection

  • Inventory installed Illustrator editions and exact version numbers.
  • Identify Desktop 2026 installations at 30.3 or earlier.
  • Identify Desktop 2025 installations at 29.8.6 or earlier.
  • Confirm managed endpoints report successful installation of the applicable updated release.
  • Review Adobe's advisory for any revised affected-version information.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-125: Exact CWE lookup

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cve · low confidence lookup

CVE-2026-34663 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
2Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N1.83.6adobe

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2026-34663Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
AdobeIllustrator Desktop 20260, 30.4unaffected
AdobeIllustrator Desktop 20250, 29.8.7unaffected
Weakness

CWE details

CWE-125

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.