CVE-2026-33076

CriticalPublic PoC

Published: 24 April 2026

Published

24 April 2026

Modified

27 April 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0041 61.4th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-33076 is a critical-severity Path Traversal (CWE-22) vulnerability in Roxy-Wi Roxy-Wi. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 38.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Directly addresses the CVE by requiring timely patching to version 8.2.6.4, which fixes the path traversal vulnerability in the haproxy_section_save interface.

SI-10 Information Input Validation good match

prevent

Requires validation of inputs to the haproxy_section_save interface, preventing path traversal attacks that enable arbitrary file writes to scheduled tasks.

AC-3 Access Enforcement good match

prevent

Enforces access controls on the web interface to block unauthenticated remote exploitation of the haproxy_section_save vulnerability.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Path traversal vulnerability (CWE-22) in the web interface of Roxy-WI allows unauthenticated remote attackers to write arbitrary files into scheduled tasks, enabling remote code execution on a public-facing application.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

Roxy-WI is a web interface for managing Haproxy, Nginx, Apache and Keepalived servers. Prior to version 8.2.6.4, the haproxy_section_save interface presents a vulnerability that could lead to remote code execution due to path traversal and writing into scheduled tasks. Version…

8.2.6.4 fixes the issue.

Deeper analysisAI

CVE-2026-33076 is a path traversal vulnerability (CWE-22) in the haproxy_section_save interface of Roxy-WI, a web interface for managing HAProxy, Nginx, Apache, and Keepalived servers. Affecting versions prior to 8.2.6.4, the flaw allows attackers to write arbitrary files into scheduled tasks, potentially leading to remote code execution. The vulnerability carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating critical severity due to its high impact on confidentiality, integrity, and availability.

The vulnerability can be exploited remotely over the network by unauthenticated attackers with no privileges or user interaction required. Successful exploitation enables full remote code execution on the affected Roxy-WI server, allowing attackers to execute arbitrary commands, potentially compromising the managed load balancers and web servers.

Mitigation is available in Roxy-WI version 8.2.6.4, which addresses the issue through a specific commit. Security practitioners should upgrade to this patched version immediately. Relevant advisories and the fixing commit are detailed in the GitHub security advisory GHSA-mmgm-p9x9-h33j and commit aecc7971959092fa93e93531f1ffcde33524b031.