CVE-2026-44852: Arubanetworks ArubaOS RCE Vulnerability

CVE-2026-44852 Overview

CVE-2026-44852 is an authenticated remote code execution vulnerability in the Aruba AOS-8 and AOS-10 web-based management interface. The flaw resides in the certificate download functionality, where improper input validation in the file path parameter allows an authenticated remote attacker to overwrite arbitrary files on the underlying operating system. Successful exploitation grants the attacker the ability to execute arbitrary commands as a privileged user. The vulnerability affects Aruba Networks ArubaOS and SD-WAN products and is tracked under [CWE-296] alongside additional weakness categorization by NVD.

Critical Impact

An authenticated attacker can overwrite arbitrary files and execute commands as a privileged user on Aruba AOS-8 and AOS-10 devices.

Affected Products

• Aruba Networks ArubaOS (AOS-8 and AOS-10)
• Aruba Networks SD-WAN
• HPE Aruba network management infrastructure running affected firmware

Discovery Timeline

• 2026-05-12 - CVE-2026-44852 published to the National Vulnerability Database
• 2026-05-15 - Last updated in NVD database

Technical Details for CVE-2026-44852

Vulnerability Analysis

The vulnerability lives in the certificate download feature of the AOS-8 and AOS-10 web-based management interface. The interface accepts a file path parameter during certificate handling without sufficient validation. An authenticated user with access to the management interface can manipulate this parameter to direct write operations outside the intended directory. This results in arbitrary file overwrite on the underlying operating system. Because privileged system files can be replaced, the attacker pivots from file write to command execution as a privileged user. The exposure is reachable over the network and requires high privileges according to the published CVSS vector.

Root Cause

The root cause is improper input validation of the file path parameter in the certificate download handler. The application does not sanitize directory traversal sequences or restrict write destinations to an allow-listed certificate directory. This weakness aligns with [CWE-296] handling deficiencies in certificate-related code paths combined with insufficient path validation.

Attack Vector

The attacker must hold valid management credentials on the affected ArubaOS or SD-WAN device. After authenticating to the web management interface, the attacker submits a crafted request to the certificate download functionality containing a manipulated file path. The malicious path causes the handler to write attacker-controlled data over a sensitive system file. Overwriting startup scripts, binaries, or configuration files used by privileged services yields code execution as that privileged user.

No verified public proof-of-concept code is available. See the HPE Security Bulletin for vendor technical details.

Detection Methods for CVE-2026-44852

Indicators of Compromise

• Unexpected requests to the certificate download endpoint of the AOS-8 or AOS-10 web management interface containing path traversal sequences such as ../ or absolute file paths
• Modification timestamps on system binaries, startup scripts, or service configuration files that do not correlate with vendor updates
• New or modified administrator sessions originating from unusual source IP addresses prior to file overwrite events

Detection Strategies

• Inspect web management interface access logs for POST or GET requests to certificate-related endpoints containing suspicious file path parameters
• Correlate authenticated administrative sessions with subsequent file system changes on the controller or gateway
• Alert on integrity changes to privileged executables and configuration directories on Aruba devices

Monitoring Recommendations

• Forward Aruba controller and gateway syslog data to a centralized analytics platform for behavioral review of administrative activity
• Monitor authentication events to the management interface and flag anomalous logins, brute force attempts, or credential reuse
• Track configuration change events and compare against approved change management tickets

How to Mitigate CVE-2026-44852

Immediate Actions Required

• Apply the security update referenced in the HPE Security Bulletin for affected AOS-8 and AOS-10 versions
• Restrict access to the web-based management interface to dedicated management networks and trusted administrator hosts
• Rotate administrative credentials and audit accounts with management interface access

Patch Information

Hewlett Packard Enterprise has published guidance and fixed firmware versions in the HPE Security Bulletin hpesbnw05048en_us. Administrators should review the bulletin to identify the appropriate fixed release for their ArubaOS or SD-WAN deployment and schedule the upgrade.

Workarounds

• Disable the web-based management interface on internet-facing or untrusted network segments where it is not required
• Enforce role-based access control to limit which administrative accounts can reach the certificate download functionality
• Place the management interface behind a jump host or VPN and apply firewall ACLs restricting source addresses

# Example: restrict management interface access on Aruba controller
configure terminal
mgmt-user access-list management mgmt-acl
ip access-list session mgmt-acl
  user host <trusted-admin-ip> any permit
  user any any deny
exit