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CVE-2026-23811

LOWCVSS 3.1/10EPSS 0.15%

Last modified

CVE-2026-23811 is a low-severity vulnerability rated 3.1/10 on the CVSS scale. 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.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
3.1/10

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability
0.15%

5.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ArubanetworksArubaos>= 6.5.4.0, <= 8.10.0.21
ArubanetworksArubaos>= 8.11.0.0, <= 8.12.0.6
ArubanetworksArubaos>= 8.13.0.0, <= 8.13.1.1
ArubanetworksArubaos>= 10.3.0.0, <= 10.4.1.10
ArubanetworksArubaos>= 10.5.0.0, <= 10.7.2.2
ArubanetworksArubaos10.8.0.0

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-23811?
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.
How severe is CVE-2026-23811?
CVE-2026-23811 has a CVSS score of 3.1/10 (LOW severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.
How do I fix CVE-2026-23811?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-23811?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST