CVE-2026-44870: Arubanetworks ArubaOS RCE Vulnerability

CVE-2026-44870 Overview

CVE-2026-44870 is a command injection vulnerability in the command line interface (CLI) service accessed via the Proprietary Access Protocol Interface (PAPI) of Aruba Networks AOS-8 and AOS-10 operating systems. An authenticated remote attacker can inject and execute arbitrary commands on the underlying operating system. The flaw maps to [CWE-77] (Improper Neutralization of Special Elements used in a Command). Successful exploitation grants attacker-controlled code execution within the context of the CLI service, undermining the confidentiality, integrity, and availability of affected Aruba controllers and SD-WAN gateways. HPE Aruba Networking has published a security advisory addressing the issue.

Critical Impact

An authenticated attacker with network reach to PAPI can execute arbitrary operating system commands on AOS-8 and AOS-10 devices, leading to full device compromise.

Affected Products

• HPE Aruba Networking AOS-8 Operating System
• HPE Aruba Networking AOS-10 Operating System
• HPE Aruba Networking SD-WAN

Discovery Timeline

• 2026-05-12 - CVE-2026-44870 published to the National Vulnerability Database (NVD)
• 2026-05-14 - Last updated in NVD database

Technical Details for CVE-2026-44870

Vulnerability Analysis

The vulnerability resides in the CLI service that processes requests delivered over the PAPI protocol. PAPI is the management protocol used by Aruba controllers, mobility conductors, and gateways to coordinate device operations. The CLI service fails to properly neutralize special elements in user-supplied input before passing them to an operating system command interpreter. An authenticated attacker who can reach the PAPI service can craft input that breaks out of intended command boundaries. The result is arbitrary command execution on the underlying operating system with the privileges of the CLI service.

Root Cause

The root cause is improper neutralization of shell metacharacters and command separators in CLI input handled through PAPI. The service constructs operating system commands using attacker-controllable strings without sufficient sanitization or use of safe parameterized execution APIs. This pattern is classified under [CWE-77]. Because privileges required are low and the attack complexity is low, any account with PAPI access becomes a viable attacker.

Attack Vector

The attack is conducted over the network against the PAPI service. The attacker must first authenticate. Once authenticated, the attacker submits CLI commands containing injection payloads such as shell metacharacters, command chaining sequences, or substitution constructs. The CLI service forwards the unsanitized input to the operating system, which executes the injected commands. No user interaction is required, and the impact extends across confidentiality, integrity, and availability.

No public proof-of-concept exploit is available for CVE-2026-44870, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the HPE Security Advisory for vendor-supplied technical details.

Detection Methods for CVE-2026-44870

Indicators of Compromise

• Unexpected child processes spawned by the CLI or PAPI service on AOS-8 and AOS-10 devices.
• CLI audit log entries containing shell metacharacters such as ;, |, &, backticks, or $(...) constructs in command arguments.
• New or modified local user accounts, SSH keys, or configuration entries on Aruba controllers without a corresponding change ticket.
• Outbound network connections originating from controller management interfaces to unfamiliar hosts.

Detection Strategies

• Enable verbose CLI command auditing on AOS-8 and AOS-10 and forward logs to a centralized SIEM for inspection.
• Build detection rules that flag CLI commands containing shell injection patterns submitted through PAPI sessions.
• Correlate authentication events on management interfaces with anomalous command execution patterns to identify abuse of low-privileged accounts.

Monitoring Recommendations

• Restrict and monitor access to PAPI (UDP/8211) using network access control lists so only management workstations can reach the protocol.
• Alert on configuration changes, account creations, and firmware modifications performed outside approved change windows.
• Review administrative account inventories regularly and remove unused or shared credentials that could enable authenticated exploitation.

How to Mitigate CVE-2026-44870

Immediate Actions Required

• Apply the fixed AOS-8 and AOS-10 software versions identified in the HPE Security Advisory to all affected controllers, gateways, and SD-WAN devices.
• Rotate credentials for all administrative and operator accounts on affected devices after patching.
• Audit recent CLI activity and configuration changes for signs of exploitation before bringing devices back into normal operation.

Patch Information

HPE Aruba Networking has released firmware updates for AOS-8 and AOS-10 that remediate CVE-2026-44870. Administrators should consult the vendor advisory hpesbnw05048en_us for the exact fixed versions covering each branch and apply them according to HPE's recommended upgrade path.

Workarounds

• Limit access to the PAPI interface to a dedicated, isolated management network using firewall rules and policy-based ACLs on controllers.
• Enforce strong, unique credentials and multi-factor authentication for all CLI-capable accounts to reduce the pool of authenticated attackers.
• Disable or remove unused management accounts and restrict role-based access so only required operators retain CLI privileges.

# Example: restrict PAPI access on the upstream firewall to a management subnet
# (vendor-neutral illustration - replace interfaces and addresses for your environment)
allow from 10.0.10.0/24 to <controller-ip> proto udp port 8211
deny  from any         to <controller-ip> proto udp port 8211