How severe is CVE-2025-15581?

CVE-2025-15581 has a CVSS 4.0 base score of 4.7, rated medium severity.

Is CVE-2025-15581 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-15581?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-15581 have an EU (EUVD) identifier?

Yes. CVE-2025-15581 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207858.

When was CVE-2025-15581 published?

CVE-2025-15581 was published on 2026-02-18 and last updated on 2026-06-17.

CVE-2025-15581

CVE-2025-15581 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 4.0 base score 4.7)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207858
Weakness: CWE-287
Published: 2026-02-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-15581?: 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.
How severe is CVE-2025-15581?: CVE-2025-15581 has a CVSS 4.0 base score of 4.7, rated medium severity.
Is CVE-2025-15581 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-15581?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-15581 have an EU (EUVD) identifier?: Yes. CVE-2025-15581 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207858.
When was CVE-2025-15581 published?: CVE-2025-15581 was published on 2026-02-18 and last updated on 2026-06-17.

References

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →