CVE-2026-22879Network attack vector

Code execution via misindexed DICOM element allocation

Published Jun 25, 2026 · Updated Jun 25, 2026

Heap-based buffer overflow in VTK 9.5.2 allows remote attackers to corrupt memory by supplying a specially crafted DICOM file. vtkDICOMItem::NewDataElement derives a slot from a decremented element count after a nonterminal list entry is deleted, suppressing array growth and writing beyond the allocation. Exploitation requires an application to process the file; the demonstrated result is a process abort, and heap metadata corruption permits code execution.

CVSS severity8.1
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in VTK 9.5.2 allows remote attackers to corrupt memory by supplying a specially crafted DICOM file. vtkDICOMItem::NewDataElement derives a slot from a decremented element count after a nonterminal list entry is deleted, suppressing array growth and writing beyond the allocation. Exploitation requires an application to process the file; the demonstrated result is a process abort, and heap metadata corruption permits code execution.

The record

CVE
CVE-2026-22879
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Kitware
Product
VTK
Classifications
CWE-129, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kitware · VTKversion=9.5.2

Published CVSS scores

8.1Cisco TalosCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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