Avigilon ACM - Host Header Injection

mediumseverity

3%likelihood of exploitation, next 30 days

88%of all CVEs are less likely

Readycheck to confirm it

A Host Header Injection vulnerability in Avigilon ACM v7.10.0.20 allows attackers to execute arbitrary code via supplying a crafted URL.

Impact

Attackers can execute arbitrary code remotely by supplying crafted URLs, potentially compromising the system.

Fix

Update to the latest version.

How to confirm it

Send: GET /
Positive when: contains_all(body, "Avigilon", "Access Control Manager")
Send: GET /
Positive when: contains in location "{{randstr}}.tld" AND status 302

Run it with nuclei: nuclei -id CVE-2025-56266 -u <target>

The full check

id: CVE-2025-56266

info:
  name: Avigilon ACM - Host Header Injection
  author: DhiyaneshDK
  severity: medium
  description: |
    A Host Header Injection vulnerability in Avigilon ACM v7.10.0.20 allows attackers to execute arbitrary code via supplying a crafted URL.
  impact: |
    Attackers can execute arbitrary code remotely by supplying crafted URLs, potentially compromising the system.
  remediation: |
    Update to the latest version.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-56266
    - https://github.com/nikolas-ch/CVEs/tree/main/AvigilonACM_v7.10.0.20/HostHeaderInjection
  metadata:
    verified: true
    max-request: 1
  tags: cve,cve2025,vuln,avigilon

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    redirects: true
    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body, "Avigilon", "Access Control Manager")'
        internal: true

  - raw:
      - |
        GET / HTTP/1.1
        Host: {{randstr}}.tld

    matchers-condition: and
    matchers:
      - type: word
        part: location
        words:
          - '{{randstr}}.tld'

      - type: status
        status:
          - 302

References

Use this check only on systems you are authorised to test. Where the data comes from