CVE-2026-23811 Unauthorized Bi-Directional Traffic Interception via L2/L3 Manipulation
Attackers can bypass client isolation and redirect traffic to perform Machine-in-the-Middle attacks on HPE Aruba wireless networks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23811?
CVE-2026-23811 is a medium-severity vulnerability in Arubanetworks Arubaos, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the client isolation mechanism may allow an attacker to bypass Layer 2 (L2) communication restrictions between clients and redirect traffic at Layer 3 (L3). In addition to bypassing policy enforcement, successful exploitation - when combined with a port-stealing attack - may enable a bi-directional Machine-in-the-Middle (MitM) attack.
Weakness: CWE-300
Which versions are affected by CVE-2026-23811?
It affects 1 product.
Products include Arubanetworks Arubaos.
How do I fix CVE-2026-23811?
No fix has been published for CVE-2026-23811 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-23811 being exploited?
There is no known exploitation of CVE-2026-23811 in the wild and no public exploit code.
Other vulnerabilities in Arubanetworks Arubaos
- CVE-2024-42393 Memory corruption in Hpe Aruba Networking InstantOS and Aruba Access Points running ArubaOS 10
- CVE-2024-42394 Memory corruption in HPE Aruba Networking InstantOS and Aruba Access Points running ArubaOS 10
- CVE-2024-42395 Memory corruption in HPE Aruba Networking InstantOS and Aruba Access Points running ArubaOS 10
- CVE-2024-31466 Unauthenticated Buffer Overflow Vulnerabilities in CLI Service Accessed by the PAPI Protocol
- CVE-2024-31467 Unauthenticated Buffer Overflow Vulnerabilities in CLI Service Accessed by the PAPI Protocol
Sources
Also known as GHSA-99rv-pxvm-xph4.