CVE-2026-44628Network attack vector

Worklist server crash via unchecked sequence downcast

Published Jun 30, 2026 · Updated Jun 30, 2026

Type confusion in OFFIS DCMTK 3.7.0 and earlier allows remote attackers to crash the wlmscpfs server via a crafted C-FIND query. The worklist data-source code casts a non-sequence element to DcmSequenceOfItems without verifying the wire VR, causing wrong-type virtual dispatch. The path requires Explicit VR, a valid worklist directory and lockfile, and a matching record; single-process mode stops the service, while default fork mode loses only the child.

CVSS severity8.7
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in OFFIS DCMTK 3.7.0 and earlier allows remote attackers to crash the wlmscpfs server via a crafted C-FIND query. The worklist data-source code casts a non-sequence element to DcmSequenceOfItems without verifying the wire VR, causing wrong-type virtual dispatch. The path requires Explicit VR, a valid worklist directory and lockfile, and a matching record; single-process mode stops the service, while default fork mode loses only the child.

The record

CVE
CVE-2026-44628
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
OFFIS e.V.
Product
DCMTK
Classifications
CWE-843, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 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=0 <=3.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OFFIS e.V. · DCMTKversion=0 <=3.7.0

Published CVSS scores

8.7ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1499.004Application or System Exploitation

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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