CVE-2026-24465 Overview
A stack-based buffer overflow vulnerability (CWE-121) exists in ELECOM wireless LAN access point devices. This critical vulnerability allows a remote attacker to send a specially crafted packet to the vulnerable device, potentially leading to arbitrary code execution. The vulnerability stems from improper bounds checking when processing network packets, enabling attackers to corrupt stack memory and gain control of program execution flow.
Critical Impact
Successful exploitation of this stack-based buffer overflow could allow unauthenticated remote attackers to execute arbitrary code on affected ELECOM wireless access points, potentially leading to complete device compromise, network infiltration, and persistent backdoor installation.
Affected Products
- ELECOM Wireless LAN Access Point Devices (specific models detailed in vendor advisory)
Discovery Timeline
- 2026-02-03 - CVE-2026-24465 published to NVD
- 2026-02-03 - Last updated in NVD database
Technical Details for CVE-2026-24465
Vulnerability Analysis
This vulnerability is classified as a stack-based buffer overflow (CWE-121), which occurs when a program writes data beyond the bounds of a fixed-size buffer allocated on the stack. In ELECOM wireless LAN access point devices, the vulnerability is triggered when processing specially crafted network packets. The root cause lies in the absence of proper input validation and boundary checking when handling incoming packet data.
The network-accessible nature of this vulnerability makes it particularly dangerous, as attackers can exploit it remotely without requiring any prior authentication or user interaction. When exploited, the attacker can overwrite critical stack data including the return address, allowing them to redirect program execution to malicious code.
Root Cause
The vulnerability exists due to insufficient bounds checking when copying data from network packets into a fixed-size stack buffer. When an oversized or malformed packet is received, the device fails to validate the input length against the allocated buffer size, allowing the excess data to overflow into adjacent stack memory regions. This includes the saved return address and other critical control data structures.
Attack Vector
The attack is network-based and does not require authentication or user interaction. An attacker can remotely send a specially crafted packet to the vulnerable ELECOM wireless LAN access point device. The malicious packet contains data exceeding the expected buffer size, along with carefully positioned shellcode or return-oriented programming (ROP) gadgets. When processed by the vulnerable function, the overflow corrupts the stack, and upon function return, execution transfers to attacker-controlled code.
The exploitation process typically involves:
- Identifying the vulnerable network service on the target device
- Crafting a packet with payload exceeding the stack buffer capacity
- Including shellcode or ROP chain to achieve code execution
- Sending the crafted packet to the target device's network interface
Detection Methods for CVE-2026-24465
Indicators of Compromise
- Unusual network traffic patterns targeting ELECOM access point management interfaces
- Unexpected device reboots or crashes that may indicate failed exploitation attempts
- Unauthorized configuration changes on affected wireless access points
- Anomalous outbound connections from network infrastructure devices
- Presence of unknown processes or services on the device
Detection Strategies
- Implement network intrusion detection system (NIDS) rules to identify malformed packets targeting ELECOM devices
- Monitor for abnormally large packets destined for access point management services
- Deploy network traffic analysis to detect exploitation attempts and C2 communications
- Configure SIEM alerts for multiple connection attempts to wireless access point interfaces
Monitoring Recommendations
- Enable comprehensive logging on network perimeter devices and firewalls
- Monitor for unusual administrative access patterns to wireless infrastructure
- Implement network segmentation monitoring between management and production networks
- Conduct regular vulnerability scanning of network infrastructure devices
- Review device logs for evidence of crash dumps or unexpected restarts
How to Mitigate CVE-2026-24465
Immediate Actions Required
- Apply firmware updates from ELECOM as soon as they become available
- Restrict network access to device management interfaces using firewall rules or ACLs
- Segment wireless access points on isolated management VLANs
- Disable unnecessary network services on affected devices
- Monitor affected devices for signs of compromise until patches are applied
Patch Information
ELECOM has released security advisories addressing this vulnerability. Administrators should obtain and apply the latest firmware updates from the official ELECOM security resources. For detailed patch information, refer to:
Ensure all affected ELECOM wireless LAN access point devices are updated to the latest firmware version that addresses CVE-2026-24465.
Workarounds
- Implement strict network access controls to limit exposure of device management interfaces
- Deploy a Web Application Firewall (WAF) or IPS with signatures for buffer overflow attacks
- Isolate affected devices on dedicated management networks inaccessible from untrusted zones
- Consider temporary device replacement with unaffected alternatives for critical infrastructure
- Implement 802.1X network access control to limit attacker access to device network segments
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
