CVE-2026-76702: HPE EdgeConnect SD-WAN Gateway DoS Vulnerability

CVE-2026-76702 Overview

CVE-2026-76702 is a denial-of-service vulnerability in the operating system of Hewlett Packard Enterprise (HPE) Networking EdgeConnect SD-WAN Gateways. An authenticated local attacker can exploit the flaw to disrupt system operations and place the appliance into an unstable state. The issue affects availability of the SD-WAN gateway, which sits at the edge of enterprise WAN deployments and brokers site-to-site connectivity.

HPE published a security bulletin documenting the vulnerability and the corresponding fixed software releases. See the HPE Security Bulletin for vendor guidance.

Critical Impact
Successful exploitation by an authenticated local user can crash or destabilize the SD-WAN gateway, disrupting branch and hub network connectivity that depends on the affected appliance.

Affected Products

HPE Networking EdgeConnect SD-WAN Gateway operating system
Specific affected versions are enumerated in the vendor advisory
Refer to the HPE Security Bulletin for the authoritative version matrix

Discovery Timeline

2026-09-15 - CVE-2026-76702 published to the National Vulnerability Database (NVD)
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-76702

Vulnerability Analysis

The vulnerability resides in the underlying operating system of the HPE Networking EdgeConnect SD-WAN Gateway. An attacker who already holds valid local credentials on the appliance can trigger a condition that disrupts normal system operation. HPE characterizes the outcome as a denial-of-service that may leave the system in an unstable state.

Because the attack vector is local and requires authentication, exploitation depends on an adversary who has previously obtained shell, management, or console access. The flaw does not enable code execution or data theft on its own, but the resulting outage can cascade to sites relying on the gateway for SD-WAN tunneling.

Root Cause

HPE has not published the specific weakness class in the public bulletin, and no CWE identifier is currently associated with CVE-2026-76702 in the NVD record. The vendor advisory attributes the impact to a defect in the gateway operating system that can be triggered from a low-privilege local context.

Attack Vector

Exploitation requires local access with low privileges and no user interaction. Attack complexity is high, indicating that the attacker must satisfy conditions outside their direct control to reliably trigger the fault. Impact is limited to availability of the gateway, with only low confidentiality and integrity impact reported.

No public proof-of-concept, exploit module, or indication of exploitation in the wild has been reported. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-76702

Indicators of Compromise

Unexpected reboots, kernel panics, or watchdog-initiated restarts of the EdgeConnect SD-WAN Gateway
Loss of SD-WAN tunnel state or BGP adjacencies coinciding with local administrative sessions
Local shell or console sessions from accounts that do not typically perform interactive management

Detection Strategies

Correlate appliance crash and restart events with authenticated local sessions in the same time window
Alert on any interactive local login to EdgeConnect gateways outside approved change windows
Track service-affecting events reported by Orchestrator against the fixed-version matrix in the HPE bulletin

Monitoring Recommendations

Forward EdgeConnect syslog, authentication, and crash telemetry to a centralized SIEM or data lake for retention and correlation
Monitor SNMP and streaming telemetry counters for abnormal process restarts and CPU or memory spikes on the gateway
Baseline normal administrative activity so anomalous local sessions surface quickly

How to Mitigate CVE-2026-76702

Immediate Actions Required

Review the HPE Security Bulletin and identify affected EdgeConnect SD-WAN Gateway software versions in the environment
Schedule upgrades to a fixed release identified by HPE as soon as maintenance windows permit
Audit local and administrative accounts on each gateway and remove unused or over-privileged users

Patch Information

HPE has issued fixed software for the affected EdgeConnect SD-WAN Gateway releases. Consult the vendor bulletin for the exact fixed version numbers that map to your currently deployed image, and validate the upgrade path through Orchestrator or the standard HPE upgrade procedure.

Workarounds

Restrict local and management-plane access to trusted administrators using role-based access control
Enforce multi-factor authentication for administrative access to the gateway and its management systems
Segment the management network so only authorized jump hosts can reach the appliance CLI and console
Increase alerting sensitivity for gateway restart and service-crash events until patching is complete

bash

# Example: limit management access to a trusted subnet via ACL
# (Adapt to EdgeConnect syntax; illustrative only)
access-list mgmt-acl permit tcp 10.10.0.0/24 any eq 22
access-list mgmt-acl permit tcp 10.10.0.0/24 any eq 443
access-list mgmt-acl deny   ip any any log