Overview
CVE-2025-56266 is a significant cybersecurity vulnerability discovered in the Avigilon Access Control Manager (ACM) software version 7.10.0.20. This vulnerability has the potential to affect a wide range of entities, from small businesses to large corporations, that use the Avigilon ACM for their access control needs. The vulnerability’s severity lies in its ability to allow attackers to execute arbitrary code through a carefully crafted URL, potentially leading to system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-56266
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: System compromise, potential data leakage
Affected Products
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Product | Affected Versions
Avigilon ACM | v7.10.0.20
How the Exploit Works
The exploit takes advantage of a Host Header Injection vulnerability. This type of vulnerability arises when the server trusts the host header and uses its value in a security-critical way. In this case, an attacker can manipulate the host header by supplying a crafted URL. This manipulation can lead to arbitrary code execution, providing the attacker with access to the system.
Conceptual Example Code
The following is a conceptual example of how the vulnerability might be exploited. This is a sample HTTP request where an attacker crafts a malicious payload in the URL:
GET / HTTP/1.1
Host: www.victim-site.com:80@evil.comIn this example, the attacker has manipulated the host header to redirect the request to ‘evil.com’ while the server thinks it is serving ‘www.victim-site.com’. This can potentially allow the attacker to execute arbitrary code by injecting it into the ‘evil.com’ site.
Mitigation
The most effective way to mitigate this vulnerability is by applying the vendor-released patch, which addresses the Host Header Injection vulnerability in the specified version of Avigilon ACM. In the meantime, before the patch can be applied, users can employ a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. This can help to monitor and block suspicious activities, thus reducing the chance of a successful exploit.
