CVE-2026-23809
Published: 04 March 2026
Summary
CVE-2026-23809 is a medium-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Arubanetworks Arubaos. Its CVSS base score is 5.4 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Network Sniffing (T1040); ranked at the 8.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Bypassing BSSID isolation enables network sniffing (T1040) and adversary-in-the-middle traffic interception/hijacking (T1557) on adjacent Wi-Fi networks.
NVD Description
A technique has been identified that adapts a known port-stealing method to Wi-Fi environments that use multiple BSSIDs. By leveraging the relationship between BSSIDs and their associated virtual ports, an attacker could potentially bypass inter-BSSID isolation controls. Successful exploitation may…
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enable an attacker to redirect and intercept the victim's network traffic, potentially resulting in eavesdropping, session hijacking, or denial of service.
Deeper analysisAI
CVE-2026-23809 involves a technique that adapts a known port-stealing method to Wi-Fi environments utilizing multiple BSSIDs. By exploiting the relationship between BSSIDs and their associated virtual ports, the vulnerability allows attackers to bypass inter-BSSID isolation controls. It affects Wi-Fi components in such configurations, as documented in the associated HPE advisory, and is linked to CWE-400 (Uncontrolled Resource Consumption). The vulnerability received a CVSS v3.1 base score of 5.4 (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) when published on 2026-03-04.
An attacker in the adjacent network (AV:A), requiring no privileges (PR:N) or user interaction (UI:N) and low attack complexity (AC:L), can exploit this to redirect and intercept a victim's network traffic. Successful exploitation enables eavesdropping, session hijacking, or denial of service, with low impacts on confidentiality and integrity but no availability disruption (C:L/I:L/A:N).
The HPE security advisory at https://support.hpesc/public/docDisplay?docId=hpesbnw05026en_us&docLocale=en_US provides further details on the vulnerability, including recommended mitigations for affected systems.
Details
- CWE(s)