CVE-2025-37166: HPE Instant On Access Points DoS Flaw

CVE-2025-37166 Overview

A Denial of Service vulnerability has been identified in HPE Networking Instant On Access Points. The vulnerability allows a malicious actor to send specially crafted packets to affected devices, causing them to enter a non-responsive state. In some cases, a hard reset may be required to restore normal operation, making this a significant availability threat for enterprise network infrastructure.

Critical Impact
Attackers can remotely render HPE Networking Instant On Access Points unresponsive, potentially disrupting network connectivity for entire segments of an organization's wireless infrastructure.

Affected Products

HPE Networking Instant On Access Points

Discovery Timeline

2026-01-13 - CVE-2025-37166 published to NVD
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-37166

Vulnerability Analysis

This vulnerability is classified under CWE-770 (Allocation of Resources Without Limits or Throttling), indicating that the affected access points fail to properly manage resource allocation when processing certain network packets. The flaw can be exploited remotely over the network without requiring authentication or user interaction, making it particularly dangerous for exposed network infrastructure.

When a specially crafted packet is processed by a vulnerable HPE Networking Instant On Access Point, the device fails to properly limit or throttle resource consumption. This leads to resource exhaustion that causes the device to become unresponsive. The severity of the impact varies—some devices may recover automatically after a period, while others require manual intervention through a hard reset to restore services.

Root Cause

The root cause of this vulnerability lies in improper resource allocation handling (CWE-770). The access point's packet processing logic does not implement adequate controls to limit resource consumption when handling malformed or specially crafted network traffic. This allows an attacker to exhaust system resources through carefully constructed packets, leading to a denial of service condition.

Attack Vector

The attack can be conducted remotely over the network. An attacker positioned on the same network segment or with network access to the target device can send specially crafted packets to the access point. The attack requires no authentication and no user interaction, making it straightforward to execute once the attacker has network access to the target device.

The attack exploits the device's packet processing mechanism by sending malformed packets that trigger resource exhaustion. The specific packet structure that causes the vulnerability has not been publicly disclosed, but the network-based attack vector means that any attacker with the ability to send packets to the access point could potentially trigger the denial of service condition.

Detection Methods for CVE-2025-37166

Indicators of Compromise

Access points becoming unresponsive or dropping connections unexpectedly
Unusual network traffic patterns with malformed packets directed at access point management interfaces
Repeated hard reset requirements for specific access points
Logging entries indicating packet processing errors or resource exhaustion conditions

Detection Strategies

Monitor network traffic for anomalous packet patterns targeting HPE Instant On Access Points
Implement network intrusion detection system (NIDS) rules to identify potential DoS attack patterns
Configure SNMP monitoring to alert on access point availability changes
Enable logging on network infrastructure to capture unusual device behavior patterns

Monitoring Recommendations

Establish baseline metrics for access point performance and availability
Configure alerts for access point connectivity drops or unresponsive states
Monitor management plane traffic for suspicious activity patterns
Implement centralized logging for all network infrastructure devices to correlate potential attack indicators

How to Mitigate CVE-2025-37166

Immediate Actions Required

Review the HPE Support Document for specific patch and mitigation guidance
Identify all HPE Networking Instant On Access Points in your environment
Implement network segmentation to limit exposure of access point management interfaces
Deploy network-based intrusion prevention to filter potentially malicious traffic

Patch Information

HPE has released security guidance for this vulnerability. Administrators should consult the official HPE Support Document for specific firmware update instructions and patch availability. Apply the recommended firmware updates as soon as possible to remediate this vulnerability.

Workarounds

Restrict network access to access point management interfaces using ACLs or firewall rules
Implement network segmentation to isolate wireless infrastructure from untrusted network segments
Enable rate limiting on network infrastructure to mitigate potential DoS attacks
Configure monitoring and alerting to quickly identify and respond to affected devices

bash

# Example: Network segmentation using VLAN isolation
# Isolate management traffic for access points
# Consult HPE documentation for device-specific configuration

# On network switch, create dedicated management VLAN
# vlan 100
# name AP-Management

# Apply ACL to restrict access to management VLAN
# ip access-list extended AP-MGMT-RESTRICT
# permit ip 10.0.0.0 0.0.0.255 10.100.0.0 0.0.0.255
# deny ip any 10.100.0.0 0.0.0.255
# permit ip any any