How severe is CVE-2015-6861?

CVE-2015-6861 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-6861 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6861?

CVE-2015-6861 primarily affects Eucalyptus. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6861?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-6861 published?

CVE-2015-6861 was published on 2016-01-05 and last updated on 2026-06-17.

CVE-2015-6861

CVE-2015-6861 is a high-severity vulnerability in Eucalyptus with a CVSS 3.x base score of 7.5. 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-264.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.6
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Eucalyptus
Published: 2016-01-05
Last modified: 2026-06-17

Description

HPE Helion Eucalyptus 3.4.0 through 4.2.0 allows remote authenticated users to bypass an intended AssumeRole permission requirement and assume an IAM role by leveraging a policy setting for a user's account.

Frequently asked questions

What is CVE-2015-6861?: HPE Helion Eucalyptus 3.4.0 through 4.2.0 allows remote authenticated users to bypass an intended AssumeRole permission requirement and assume an IAM role by leveraging a policy setting for a user's account.
How severe is CVE-2015-6861?: CVE-2015-6861 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-6861 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6861?: CVE-2015-6861 primarily affects Eucalyptus. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6861?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-6861 published?: CVE-2015-6861 was published on 2016-01-05 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:a:eucalyptus:eucalyptus:3.4.0:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:3.4.1:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:3.4.2:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:3.4.3:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:4.1.2:*:*:*:*:*:*:*
cpe:2.3:a:eucalyptus:eucalyptus:4.2.0:*:*:*:*:*:*:*

More vulnerabilities in Eucalyptus

CVE-2013-4767 — Critical (CVSS 10.0): Unspecified vulnerability in Eucalyptus before 3.3.2 has unknown impact and attack vectors.
CVE-2016-8528 — High (CVSS 8.8): A Remote Escalation of Privilege vulnerability in HPE Helion Eucalyptus version 3.3.0 through 4.3.1 was found.
CVE-2016-8520 — High (CVSS 8.8): HPE Helion Eucalyptus v4.3.0 and earlier does not correctly check IAM user's permissions for accessing versioned…
CVE-2012-3241 — High (CVSS 7.5): The VMware Broker in Eucalyptus 2.0.3 and 3.0.x before 3.0.2 does not properly authenticate SOAP requests, which allows…
CVE-2012-3240 — High (CVSS 7.5): The Walrus service in Eucalyptus 2.0.3 and 3.0.x before 3.0.2 allows remote attackers to gain administrator privileges…
CVE-2010-3905 — High (CVSS 7.5): The password reset feature in the administrator interface for Eucalyptus 2.0.0 and 2.0.1 does not perform…

All CVEs affecting Eucalyptus →

Other CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities

CVE-2016-8363 — Critical (CVSS 10.0): An issue was discovered in Moxa OnCell OnCellG3470A-LTE, AWK-1131A/3131A/4131A Series, AWK-3191 Series, AWK-5232/6232…
CVE-2016-7457 — Critical (CVSS 10.0): VMware vRealize Operations (aka vROps) 6.x before 6.4.0 allows remote authenticated users to gain privileges, or halt…
CVE-2015-7425 — Critical (CVSS 10.0): The Data Protection component in the VMware vSphere GUI in IBM Tivoli Storage Manager for Virtual Environments: Data…
CVE-2015-8267 — Critical (CVSS 10.0): The PasswordReset.Controllers.ResetController.ChangePasswordIndex method in PasswordReset.dll in Dovestones AD Self…
CVE-2015-7919 — Critical (CVSS 10.0): SearchBlox 8.3 before 8.3.1 allows remote attackers to write to the config file, and consequently cause a denial of…
CVE-2015-7071 — Critical (CVSS 10.0): The File Bookmark component in Apple OS X before 10.11.2 allows attackers to bypass a sandbox protection mechanism for…

Browse all CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities →