Vulnerability · Published Feb 18, 2026 · Assigned by PRJBLK
CVE-2025-15581
Medium 4.7
In plain English
A medium-severity improper authentication in orthanc from orthanc-server. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)4.7Medium
Exploit odds (30 days)0.6%top 53.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Orthanc versions before 1.12.10 are affected by an authorisation logic flaw in the application's HTTP Basic Authentication implementation. Successful exploitation could result in Privilege Escalation, potentially allowing full administrative access.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | orthanc | no fix listed | DEBIAN-CVE-2025-15581 |
| Debian:13 | orthanc | no fix listed | DEBIAN-CVE-2025-15581 |
| Debian:14 | orthanc | 1.12.10+dfsg-1 | DEBIAN-CVE-2025-15581 |
| Ubuntu:22.04:LTS | orthanc | no fix listed | UBUNTU-CVE-2025-15581 |
| Ubuntu:24.04:LTS | orthanc | no fix listed | UBUNTU-CVE-2025-15581 |
| Ubuntu:25.10 | orthanc | no fix listed | UBUNTU-CVE-2025-15581 |
| Ubuntu:26.04:LTS | orthanc | no fix listed | UBUNTU-CVE-2025-15581 |
| Ubuntu:26.10 | orthanc | no fix listed | UBUNTU-CVE-2025-15581 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| orthanc-server | orthanc | 0 – through 1.12.9 |
Weakness: CWE-287 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P