CVE-2026-73757 in AOS-CX
Summary
by MITRE • 09/01/2026
A vulnerability in the web-based management interface of AOS-CX could allow an authenticated remote attacker to conduct a server-side request forgery (SSRF) attack. A successful exploit allows an attacker to enumerate information about the internal structure of the AOS-CX host, leading to potential disclosure and limited modification of sensitive information.
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Analysis
by VulDB Data Team • 09/01/2026
The vulnerability identified in the Aruba OS-CX web-based management interface represents a significant security risk due to its classification as a server-side request forgery (SSRF) flaw. This type of attack exploits the trust that a server places in user-supplied input, specifically when that input is used by the backend application to make requests to other services or internal resources without sufficient validation. In this specific instance, an authenticated remote attacker can manipulate these inputs to direct the AOS-CX system to communicate with unintended destinations within the network infrastructure. The requirement for authentication indicates that while the attack surface is somewhat restricted compared to unauthenticated exploits, it still poses a severe threat because compromised credentials are relatively common in enterprise environments through phishing or credential stuffing attacks.
From a technical perspective, the core flaw lies in how the management interface processes URLs or hostnames provided by users during administrative tasks. Instead of strictly validating that these inputs refer only to allowed external services or local loopback addresses, the application likely fails to enforce strict allow-listing mechanisms for internal IP ranges and private network segments. This oversight allows an attacker to craft requests that cause the server to initiate connections to internal systems such as database servers, other management interfaces, or cloud metadata endpoints. By analyzing the responses returned by these internal services, whether through HTTP status codes, response bodies, or error messages, the attacker can infer details about the network topology and running services on the host system.
The operational impact of this vulnerability centers on information disclosure and potential lateral movement within a protected network environment. Successful exploitation enables an adversary to enumerate sensitive information regarding the internal structure of the AOS-CX host. This includes identifying active ports, service versions, and potentially discovering other devices connected to the same management VLAN or subnet. The ability to disclose such data facilitates further reconnaissance efforts, allowing attackers to map out the attack surface more effectively. Furthermore, while the primary impact described is limited modification of sensitive information, SSRF vulnerabilities can often be chained with other flaws to achieve remote code execution or unauthorized access to backend databases, thereby escalating from mere enumeration to full system compromise.
This vulnerability aligns closely with CWE-918, which defines Server-Side Request Forgery as a weakness where the web server receives a URL or similar request and makes it without validating the user-supplied input. Additionally, in terms of offensive security frameworks, this activity corresponds to ATT&CK technique T1571, specifically sub-technique T1571.002 for Non-Standard Port usage if internal services are accessed on non-standard ports, or generally under reconnaissance activities that gather information about the target environment. The exploitation path typically involves sending crafted HTTP requests through the web interface to trigger these unintended server-side actions.
Mitigation strategies must focus on strict input validation and network segmentation principles. Administrators should ensure that the AOS-CX management plane is isolated from general user traffic using VLANs or firewall rules, limiting exposure to only authorized administrative subnets. Implementing a reverse proxy with robust URL filtering can also help by inspecting outbound requests made by the application server and blocking those directed at private IP ranges such as 10.x.x.x, 172.16.x.x through 172.31.x.x, or 192.168.x.x unless explicitly required for specific functions. Regularly updating to patched versions of Aruba OS-CX is critical, as vendors typically release fixes that enforce stricter validation logic on user-supplied URLs within the management interface components.