CVE-2026-25077

Severity CVSS v4.0:

Pending analysis

Type:

CWE-94 Code Injection

Publication date:

08/05/2026

Last modified:

10/05/2026

Description

Account users are allowed by default to register templates to be downloaded directly to the primary storage for deploying instances using the KVM hypervisor. Due to missing file name sanitization, an attacker can register malicious templates to execute arbitrary code on the KVM hosts. This can result in the compromise of resource integrity and confidentiality, data loss, denial of service, and availability of the KVM-based infrastructure managed by CloudStack.<br /> <br /> <br /> Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:apache:cloudstack::::::::	4.11.0.0 (including)	4.20.3.0 (excluding)
cpe:2.3:a:apache:cloudstack::::::::	4.21.0.0 (including)	4.22.0.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-25077

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools