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

CVE-2026-5443Orthanc-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 during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.

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-2026-5443

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-2026-5443