Hewlett Packard Enterprise (HPE) has released patches for a critical remote code execution vulnerability, identified as CVE-2026-73749, affecting its ArubaOS-CX network operating system. This buffer overflow flaw allows unauthenticated attackers to achieve elevated privileges and execute code by sending specially crafted packets to a vulnerable daemon process.
ArubaOS-CX is the operating system for HPE Aruba Networking's enterprise-grade network switches, which are widely deployed in large businesses, government agencies, universities, healthcare organizations, data centers, and by service providers.
HPE's security bulletin details that the vulnerability stems from improper processing of malformed input within a daemon of ArubaOS-CX. The company urges customers to upgrade to patched versions immediately. Affected release branches and their corresponding fixes include: 10.18.0001 should upgrade to 10.18.1002+ 10.17.1021 and earlier should upgrade to 10.17.1030+ 10.16.1051 and earlier should upgrade to 10.16.1060+ 10.13.1180 and earlier should upgrade to 10.13.1190+ 10.10.1180 and earlier should upgrade to 10.10.1181+
HPE notes that version 10.10.1181 of AOS-CX has reached its End of Maintenance (EOM) phase, meaning it will only receive fixes for critical issues discovered internally, a category that includes CVE-2026-73749.
In addition to the critical CVE-2026-73749, HPE's bulletin addresses 23 other security vulnerabilities in ArubaOS-CX, several of which carry high severity ratings between 8.1 and 8.8. These include:
CVE-2026-73750: An authenticated remote attacker with low privileges can cause a denial of service or execute code with elevated privileges by sending malformed or truncated input to an AOS-CX management module.
CVE-2026-73751: A low-privileged authenticated user can execute arbitrary commands on the underlying operating system by submitting crafted input through the AOS-CX web-based management interface.
CVE-2026-73752: An unauthenticated attacker with adjacent-network access can exploit an AOS-CX API endpoint to write arbitrary files to the underlying operating system, potentially leading to remote code execution.
CVE-2026-73753: A low-privileged authenticated user can execute arbitrary commands as a privileged user on the underlying operating system by exploiting affected AOS-CX command-line operations.
CVE-2026-73782: An unauthenticated attacker with adjacent-network access can exploit a format-string vulnerability in the AOS-CX command-line interface to execute arbitrary code as a privileged user on the underlying operating system.
CVE-2026-73781: An authenticated remote attacker can exploit a stored cross-site scripting vulnerability in the AOS-CX web-based management interface to execute arbitrary scripts in an administrator’s browser if the administrator interacts with the affected content.
CVE-2026-73780: An unauthenticated remote attacker can exploit missing Cross-Site Request Forgery (CSRF) protections in some certificate-authenticated AOS-CX sessions to submit arbitrary input to the web-based management interface by convincing an authenticated user to open a crafted URL.
CVE-2026-73779: An unauthenticated attacker with adjacent-network access can bypass authentication controls on AOS-CX switches, potentially exposing sensitive information, enabling unauthorized modifications, and disrupting services.
CVE-2026-73778: An unauthenticated remote attacker can obtain full administrative control of an AOS-CX device by using a predictable factory-default password if the device remains in its factory-default or post-Zero Touch Provisioning (ZTP) state before an administrator configures credentials.
CVE-2026-73777: An unauthenticated remote attacker can exploit vulnerabilities in an AOS-CX API endpoint to bypass access controls and escalate privileges.
HPE confirmed that as of the bulletin's publication date, it had no knowledge of active exploitation or publicly available proof-of-concept exploits for any of the listed vulnerabilities.
