CVE-2026-24465 is a stack-based buffer overflow vulnerability identified in ELECOM CO.,LTD.'s wireless LAN access point device model WAB-S733IW2-PD, specifically affecting firmware versions v5.5.00 and earlier. The vulnerability arises from improper handling of input data in the device's network packet processing routines, allowing an attacker to craft a malicious packet that overflows the stack buffer. This overflow can overwrite the return address or other control data on the stack, enabling arbitrary code execution with the privileges of the affected process. The attack vector is network-based (AV:N), requires no privileges (PR:N), and no user interaction (UI:N), making it highly exploitable remotely. The vulnerability impacts confidentiality, integrity, and availability (C:H/I:H/A:H), potentially allowing attackers to take full control of the device, intercept or manipulate network traffic, disrupt wireless services, or use the device as a foothold for further network intrusion. No public exploits have been reported yet, but the critical CVSS score of 9.8 reflects the severity and ease of exploitation. The vulnerability was published on February 3, 2026, with the initial reservation on January 30, 2026. No official patches or firmware updates have been linked yet, indicating a need for vigilance and proactive mitigation by affected users.

For European organizations, this vulnerability poses a significant risk due to the potential for complete compromise of wireless LAN access points, which are critical for network connectivity and security. Exploitation could lead to unauthorized access to internal networks, interception of sensitive communications, disruption of wireless services, and lateral movement within corporate environments. Industries relying heavily on wireless infrastructure, such as finance, healthcare, manufacturing, and government, could face operational disruptions and data breaches. The critical nature of the vulnerability means that attackers could deploy malware, exfiltrate data, or establish persistent access without detection. Given the lack of known exploits in the wild, proactive measures can still prevent exploitation, but the window for attack is open until patches are released and applied. The impact extends beyond individual organizations to national critical infrastructure if these devices are deployed in essential services.

1. Monitor ELECOM's official channels for firmware updates addressing this vulnerability and apply patches immediately upon release. 2. If patches are not yet available, consider temporarily isolating or replacing vulnerable devices, especially in sensitive network segments. 3. Implement network segmentation to limit access to wireless access points from untrusted networks. 4. Deploy strict ingress and egress filtering on network perimeters to block malformed or suspicious packets targeting the affected devices. 5. Use intrusion detection and prevention systems (IDPS) tuned to detect anomalous traffic patterns or exploit attempts against wireless infrastructure. 6. Conduct regular vulnerability assessments and penetration testing focusing on wireless network components. 7. Maintain an asset inventory to identify all ELECOM WAB-S733IW2-PD devices and verify firmware versions. 8. Educate network administrators about the vulnerability and encourage rapid incident response readiness. 9. Consider deploying additional authentication and encryption layers on wireless networks to reduce exposure. 10. Review and enhance logging and monitoring to detect early signs of exploitation attempts.