CVE-2026-5444

Memory corruption via overflowed PAM buffer size

Published Apr 9, 2026 · Updated Apr 9, 2026

Heap buffer overflow in Orthanc 1.12.10 and earlier allows attackers to corrupt memory through a crafted PAM image embedded in a DICOM file. The PAM parser multiplies attacker-controlled image dimensions with 32-bit unsigned arithmetic, allocates the wrapped small buffer, then writes the full pixel data beyond it. Orthanc must process the crafted file; the resulting memory corruption can crash the server, while arbitrary code execution is not established for this flaw.

CVSS severity7.1
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap buffer overflow in Orthanc 1.12.10 and earlier allows attackers to corrupt memory through a crafted PAM image embedded in a DICOM file. The PAM parser multiplies attacker-controlled image dimensions with 32-bit unsigned arithmetic, allocates the wrapped small buffer, then writes the full pixel data beyond it. Orthanc must process the crafted file; the resulting memory corruption can crash the server, while arbitrary code execution is not established for this flaw.

The record

CVE
CVE-2026-5444
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
Orthanc
Product
Orthanc
Classifications
CWE-787, CWE-190, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=1.12.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Orthanc · Orthancversion=0 <=1.12.10

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/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.

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

No observations available

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

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-190Integer Overflow or Wraparound
T1204.002User Execution: Malicious File

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo