How severe is CVE-2026-25077?

CVE-2026-25077 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-25077 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25077?

CVE-2026-25077 affects Apache Cloudstack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25077?

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.

Does CVE-2026-25077 have an EU (EUVD) identifier?

Yes. CVE-2026-25077 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28549.

When was CVE-2026-25077 published?

CVE-2026-25077 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2026-25077

CVE-2026-25077 is a high-severity vulnerability in Apache Cloudstack with a CVSS 3.x base score of 8.8. 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28549
Weakness: CWE-94
Affected product: Apache Cloudstack
Published: 2026-05-08
Last modified: 2026-06-17

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. Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.

Frequently asked questions

What is CVE-2026-25077?: 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. Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.
How severe is CVE-2026-25077?: CVE-2026-25077 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-25077 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25077?: CVE-2026-25077 affects Apache Cloudstack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25077?: 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.
Does CVE-2026-25077 have an EU (EUVD) identifier?: Yes. CVE-2026-25077 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28549.
When was CVE-2026-25077 published?: CVE-2026-25077 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Cloudstack

CVE-2012-4501 — Critical (CVSS 10.0): Citrix Cloud.com CloudStack, and Apache CloudStack pre-release, allows remote attackers to make arbitrary API calls by…
CVE-2024-39864 — Critical (CVSS 9.8): The CloudStack integration API service allows running its unauthenticated API server (usually on port 8096 when…
CVE-2024-38346 — Critical (CVSS 9.8): The CloudStack cluster service runs on unauthenticated port (default 9090) that can be misused to run arbitrary…
CVE-2024-29006 — Critical (CVSS 9.8): By default the CloudStack management server honours the x-forwarded-for HTTP header and logs it as the source IP of an…
CVE-2022-35741 — Critical (CVSS 9.8): Apache CloudStack version 4.5.0 and later has a SAML 2.0 authentication Service Provider plugin which is found to be…
CVE-2019-17562 — Critical (CVSS 9.8): A buffer overflow vulnerability has been found in the baremetal component of Apache CloudStack. This applies to all…

All CVEs affecting Apache Cloudstack →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.

Browse all CWE-94 (Code Injection) vulnerabilities →