How severe is CVE-2025-56266?

CVE-2025-56266 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-56266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56266?

CVE-2025-56266 affects Avigilon Access Control Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56266?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-56266 have an EU (EUVD) identifier?

Yes. CVE-2025-56266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27158.

When was CVE-2025-56266 published?

CVE-2025-56266 was published on 2025-09-08 and last updated on 2026-06-17.

CVE-2025-56266

CVE-2025-56266 is a critical-severity vulnerability in Avigilon Access Control Manager with a CVSS 3.x base score of 9.8. 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-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27158
Weakness: CWE-74
Affected product: Avigilon Access Control Manager
Published: 2025-09-08
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-56266?: A Host Header Injection vulnerability in Avigilon ACM v7.10.0.20 allows attackers to execute arbitrary code via supplying a crafted URL.
How severe is CVE-2025-56266?: CVE-2025-56266 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-56266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56266?: CVE-2025-56266 affects Avigilon Access Control Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-56266 have an EU (EUVD) identifier?: Yes. CVE-2025-56266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27158.
When was CVE-2025-56266 published?: CVE-2025-56266 was published on 2025-09-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:avigilon:access_control_manager:7.10.0.20:*:*:*:*:*:*:*

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