Low severity · published Mar 4, 2026
CVE-2026-23811
Unauthorized Bi-Directional Traffic Interception via L2/L3 Manipulation
3.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HA
HPE Aruba Networking Wireless Operating Systems (AOS-8 & AOS-10) · Hewlett Packard Enterprise (HPE)
10.8.0.0; 10.7.0.0 through 10.7.2.2; 10.4.0.0 through 10.4.1.10; 8.13.0.0 through 8.13.1.1; 8.12.0.0 through 8.12.0.6; 8.10.0.0 through 8.10.0.21 · source: vendor
AR
Arubaos · Arubanetworks
6.5.4.0 through 8.10.0.21; 8.11.0.0 through 8.12.0.6; 8.13.0.0 through 8.13.1.1; 10.3.0.0 through 10.4.1.10; 10.5.0.0 through 10.7.2.2; 10.8.0.0 · source: NVD
Affected product
HA
HPE Aruba Networking Wireless Operating Systems (AOS-8 & AOS-10)
Hewlett Packard Enterprise (HPE)
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23811
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-23811
Vendor Advisory
https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05026en_us&docLocale=en_US
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