CVE•Published 2026-04-09•Modified 2026-04-14•1 article on news•7 live references•NVD data

CVE-2026-5442Orthanc-server · Orthanc

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

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

EPSS percentile

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Weaknesses (CWE)

CWE-787Out-of-bounds Write

Description

A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.

Timeline

Published 2026-04-09

Modified 2026-04-14

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-5442

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Orthanc-server Orthanc"

All exposed Orthanc-server Orthanc instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Orthanc"

HTTP body or banner mentions "Orthanc" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-5442