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CVE Record

CVE-2026-27286: InDesign Desktop | Heap-based Buffer Overflow (CWE-122)

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.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A malicious InDesign file could cause affected desktop versions to reveal sensitive information from application memory. An attacker must persuade a user to open the file. The supplied evidence describes confidentiality loss, not code execution, data alteration, or service disruption.

Executive priority

Schedule prompt remediation through normal vulnerability-management processes. Accelerate updates for creative teams handling external files or sensitive material. The required user action and lack of cited active exploitation reduce immediate urgency, while potentially high memory confidentiality impact remains material.

Technical view

CVE-2026-27286 is a heap-based buffer overflow (CWE-122) in Adobe InDesign Desktop 20.5.2, 21.2, and earlier. It has CVSS 3.1 score 5.5: local attack vector, low complexity, no privileges, required user interaction, and high confidentiality impact only.

Likely exposure

Organizations using InDesign Desktop 20.5.2, 21.2, or earlier are potentially exposed, especially where users open externally supplied or untrusted design files. Systems without affected InDesign versions are not indicated as exposed.

Exploitation context

Exploitation requires a victim to open a malicious file. The supplied bundle reports no CISA KEV listing and provides no evidence of active exploitation. No network-only exploitation path is described.

Researcher notes

The supplied record limits demonstrated impact to memory exposure. Its CVSS vector assigns C:H, I:N, and A:N. No exploitability evidence, technical root-cause detail beyond CWE-122, indicators of compromise, or product-specific workaround is included. Avoid assuming code execution from the overflow classification alone.

Mitigation direction

  • Update affected InDesign installations according to Adobe advisory APSB26-32.
  • Prioritize users who routinely receive InDesign files from external parties.
  • Restrict or quarantine untrusted design files until affected installations are updated.
  • Check Adobe guidance for supported release-specific remediation details.

Validation and detection

  • Inventory installed InDesign Desktop versions across managed endpoints.
  • Identify installations running 20.5.2, 21.2, or earlier.
  • Confirm remediated versions against Adobe advisory APSB26-32.
  • Verify update deployment and rescan endpoints for remaining affected versions.
  • Review file-ingress controls for externally supplied InDesign documents.
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-122: Exact CWE lookup

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cve · low confidence lookup

CVE-2026-27286 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-2026-27286Attack 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
AdobeInDesign Desktop0, 21.3, 0, 20.5.3unaffected
Weakness

CWE details

CWE-122

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