CVE-2026-76701: HPE EdgeConnect SD-WAN Information Disclosure

CVE-2026-76701 Overview

CVE-2026-76701 is an information disclosure vulnerability affecting an API endpoint in HPE Networking EdgeConnect SD-WAN Gateways. An unauthenticated remote attacker can query the exposed endpoint over the network to retrieve sensitive information without any user interaction. The disclosed data can help an attacker pivot to further access on network services supported by the affected gateways. HPE published a security advisory tracking the issue, and it was added to the National Vulnerability Database in September 2026.

Critical Impact
Unauthenticated network attackers can retrieve sensitive information from EdgeConnect SD-WAN Gateway APIs, enabling reconnaissance for follow-on attacks against SD-WAN infrastructure.

Affected Products

HPE Networking EdgeConnect SD-WAN Gateway
Refer to the HPE Security Advisory for the fixed version list
Deployments exposing the gateway API to untrusted networks

Discovery Timeline

2026-09-15 - CVE-2026-76701 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-76701

Vulnerability Analysis

The vulnerability resides in an API endpoint exposed by HPE Networking EdgeConnect SD-WAN Gateways. The endpoint returns sensitive information without requiring authentication, which qualifies as an Information Exposure weakness. An attacker reaching the API over the network can enumerate configuration or operational details that support subsequent intrusion activity.

Exploitation does not affect integrity or availability. The impact is limited to confidentiality, but the disclosed information can meaningfully assist attackers targeting adjacent network services routed through the SD-WAN fabric. HPE describes the outcome as enabling potential further access to services supported by the gateway.

The attack complexity is elevated because successful exploitation depends on conditions outside the attacker's direct control, such as timing, deployment state, or specific request patterns. This constrains opportunistic mass exploitation but does not eliminate targeted risk against exposed gateways.

Root Cause

The root cause is missing or insufficient access control on an API endpoint that returns sensitive information. The endpoint responds to unauthenticated network requests and does not gate the response behind an authenticated session, token, or mutual TLS. Consult the HPE Security Advisory for the specific endpoint and fixed builds.

Attack Vector

The attack vector is network based. An attacker with reachability to the gateway management or data-plane API surface issues crafted HTTP requests to the vulnerable endpoint. No credentials, prior foothold, or user interaction are required. Gateways exposed to the internet or reachable from lower-trust network segments carry the highest exposure.

No public proof-of-concept exploit or exploitation-in-the-wild reporting is available at the time of publication. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-76701

Indicators of Compromise

Unauthenticated HTTP or HTTPS requests to EdgeConnect SD-WAN Gateway API endpoints from unexpected source addresses
Repeated or scripted API requests that receive successful 200 OK responses without an associated authenticated session
Requests originating from public-cloud scanners, TOR exit nodes, or known reconnaissance infrastructure

Detection Strategies

Enable API access logging on the EdgeConnect gateway and forward logs to a centralized analytics platform for baseline comparison
Alert on API responses returned to sources that never completed an authentication handshake
Correlate reconnaissance-style API access with subsequent authentication attempts against downstream network services

Monitoring Recommendations

Monitor edge firewalls for inbound traffic to gateway management interfaces from non-administrative networks
Track anomalous volumes of small, similar API requests indicative of automated scraping
Review netflow between the SD-WAN gateway and internal service segments for unexpected follow-on access

How to Mitigate CVE-2026-76701

Immediate Actions Required

Apply the fixed firmware version listed in the HPE Security Advisory for HPE Networking EdgeConnect SD-WAN Gateways
Inventory all EdgeConnect gateways and confirm that management APIs are not exposed to untrusted networks
Rotate credentials and secrets for downstream services that could be inferred from disclosed information

Patch Information

HPE has published fixed firmware for HPE Networking EdgeConnect SD-WAN Gateways. Refer to the HPE Security Advisory for affected release trains and the corresponding fixed versions. Apply the vendor patch as the primary remediation.

Workarounds

Restrict access to the gateway API to administrative source addresses using access control lists or firewall rules
Place the gateway management interface on a dedicated out-of-band network segment
Terminate API access behind an authenticating reverse proxy or VPN until the patch is deployed

bash

# Example ACL concept - restrict gateway API to administrative subnet
# Replace 10.10.0.0/24 with your administrator management subnet
# Replace <gateway-ip> with the EdgeConnect gateway address
iptables -A INPUT -p tcp -d <gateway-ip> --dport 443 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp -d <gateway-ip> --dport 443 -j DROP