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

published 2025-09-08 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-27158

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 3.0%; EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits: 0; none known, plus a Nuclei check

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 14 mo ago (2025-09-08)

Exploit prediction

3.00% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template Avigilon ACM - Host Header Injection nuclei detection template
github.com https://github.com/nikolas-ch/CVEs/tree/main/AvigilonACM_v7.10.0.20/ referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/nikolas-ch/CVEs/tree/main/AvigilonACM_v7.10.0.20/HostHeaderInjection referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/nikolas-ch/CVEs/blob/main/AvigilonACM_v7.10.0.20/HostHeaderInjection/HostHeaderInjection.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-444 Inconsistent Interpretation of HTTP Requests
CWE-116 Improper Encoding or Escaping of Output
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

github.com /nikolas-ch/CVEs/tree/main/AvigilonACM_v7.10.0.20/
exploit
github.com /nikolas-ch/CVEs/tree/main/AvigilonACM_v7.10.0.20/HostHeaderInjection
exploit
github.com /nikolas-ch/CVEs/blob/main/AvigilonACM_v7.10.0.20/HostHeaderInjection/HostHeaderInjection.txt
exploit, third-party-advisory

Sources

CVE List CVE-2025-56266
NVD CVE-2025-56266

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary