CVE-2026-77654 in Horizon Security Analyzer
Summary
by MITRE • 09/08/2026
Improper Privilege Management vulnerability in Horizon Security Analyzer (formerly AlgoSec Firewall Analyzer) on Linux, 64 bit allows Privilege Escalation and Parameter Injection.
A local user with access to the command line may escalate their privileges by abusing the parameters of a command that is approved in the sudoers file.
This issue affects Horizon Security Analyzer : A33.10, A33.20 and A33.30.
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Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified as an improper privilege management flaw within Horizon Security Analyzer, formerly known as AlgoSec Firewall Analyzer, represents a critical security risk for organizations relying on this Linux-based 64-bit platform for network security analysis. This specific weakness allows local users to escalate their privileges beyond the intended boundaries and inject arbitrary parameters into commands that are ostensibly approved through sudoers configurations. The affected versions include A33.10, A33.20, and A33.30, indicating a systemic issue in how these releases handle command execution permissions and input validation for privileged operations.
At the technical core of this vulnerability is the misconfiguration or improper implementation of sudo rules that govern access to specific system commands. When a local user possesses shell access, they can exploit poorly written wrapper scripts or direct command invocations listed in the sudoers file by supplying maliciously crafted arguments. This abuse enables parameter injection, where an attacker manipulates input variables to alter the behavior of privileged processes. By injecting additional parameters, the user can trick the system into executing unintended commands with elevated privileges, effectively bypassing standard access controls and gaining root-level or administrative control over the host environment.
The operational impact of this vulnerability is severe, as it directly compromises the integrity and confidentiality of the security analyzer appliance itself. An attacker who successfully exploits this flaw can modify firewall rules, exfiltrate sensitive network topology data, disable logging mechanisms to cover their tracks, or install persistent backdoors for long-term access. Since Horizon Security Analyzer often holds deep visibility into an organization's network infrastructure and policy configurations, compromising its underlying operating system provides a strategic foothold that can be leveraged for broader lateral movement within the enterprise network. This undermines the very purpose of deploying such security tools, as the defender’s primary monitoring asset becomes compromised by insider threats or external actors who have gained initial local access.
From a classification perspective, this issue aligns with CWE-269, which denotes Improper Privilege Management, specifically highlighting failures in enforcing least privilege principles during command execution. Furthermore, it relates to CWE-78, the OS Command Injection vulnerability class, as the exploitation involves manipulating inputs that are passed directly to operating system commands without adequate sanitization. In terms of adversary behavior, this technique corresponds to ATT&CK tactic T1068, Exploitation for Privilege Escalation, and potentially T1059, Command and Scripting Interpreter, where attackers use legitimate tools like sudo in unintended ways to achieve their objectives.
Mitigation strategies must focus on immediate remediation of the software version alongside hardening of system configurations. Organizations running affected versions A33.10 through A33.30 should prioritize upgrading to a patched release provided by Horizon Security Analyzer as soon as possible, ensuring that vendor-recommended security patches are applied promptly. In parallel, administrators should audit sudoers files for any entries that allow command execution with wildcards or insufficient parameter validation, adhering strictly to the principle of least privilege by restricting access only to necessary commands and arguments. Implementing mandatory access control systems such as SELinux can also provide an additional layer of defense by limiting what actions even privileged processes are allowed to perform, thereby reducing the blast radius if a vulnerability is exploited. Regular monitoring for unusual sudo usage patterns via centralized logging solutions will further aid in detecting potential exploitation attempts before significant damage occurs.