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CVE-2026-25077VulnerabilityPublished

Account users are allowed by default to register templates to be downloaded directly to the primary storage for deploying instances using the KVM hypervisor

Source GCVE Database

0
Authoritative record:CVE-2026-25077· High 8.8

Not known to be exploited · CVSS 8.8 High.

Data as of 27 Oct 2026, 00:07 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Apache Software FoundationApache CloudStackAffected
  • >=4.11.0 <=4.20.2.0
  • >=4.21.0.0 <=4.22.0.0
Fixed in–
Mavenorg.apache.cloudstack/cloudstackpkg:maven/org.apache.cloudstack/cloudstackOther threatsAffected
  • =4.11.0
  • =4.21.0.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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.

References

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