BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-23811High confidence

Unauthorized Bi-Directional Traffic Interception via L2/L3 Manipulation

Hewlett Packard Enterprise (HPE) · HPE Aruba Networking Wireless Operating Systems (AOS-8 & AOS-10)

4.3MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.16% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Hewlett Packard Enterprise (HPE) HPE Aruba Networking Wireless Operating Systems (AOS-8 & AOS-10) and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
HPESBNW05026 · CSAF 2.0 · revision 2 · finalHPE NetworkingUnauthorized Bi-Directional Traffic Interception via L2/L3 Manipulation
2 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • HPE Aruba Networking Operating System AOS-10
  • HPE Aruba Networking Operating System AOS-8
Summary
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.
Remediation
Upgrade Mobility Conductors, Controllers, Gateways, and Access Points to one of the following AOS-10 or AOS-8 versions (as applicable) to resolve the vulnerabilities described in the details section: - AOS-10.8.x.x: 10.8.0.1 and above (Release ETA: First half of March 2026); - AOS-10.7.x.x: 10.7.2.3 and above; - AOS-10.4.x.x: 10.4.1.11 and above; - AOS-8.13.x.x: 8.13.1.2 and above; - AOS-8.12.x.x: 8.12.0.7 and above (Release ETA: Second half of March 2026); - AOS-8.10.x.x: 8.10.0.22 and above (Release ETA: First half of March 2026). Software versions with resolution/fixes for the vulnerabilities covered above can be downloaded from the HPE Networking Support Portal at https://networkingsupport.hpe.com/globalsearch#tab=Software HPE Aruba Networking does not evaluate or patch AOS-10 and AOS-8 software branches that have reached their End of Maintenance (EoM) milestone. For more information about HPE Aruba Networking's End of Life policy visit: https://www.hpe.com/psnow/doc/a00143052enw.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-9417

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

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.

What

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.

Why

The product does not adequately verify the identity of actors at both ends of a communication channel, or does not adequately ensure the integrity of the channel, in a way that allows the channel to be accessed or influenced by an actor that is not an endpoint.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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.

Why

The product does not adequately verify the identity of actors at both ends of a communication channel, or does not adequately ensure the integrity of the channel, in a way that allows the channel to be accessed or influenced by an actor that is not an endpoint.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
an adjacent network → Channel Accessible by Non-Endpoint → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Adjacent
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-300 ↗

CWE-300: Channel Accessible by Non-Endpoint. The product does not adequately verify the identity of actors at both ends of a communication channel, or does not adequately ensure the integrity of the channel, in a way that allows the channel to be accessed or influenced by an actor that is not an endpoint.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
UnauthenticatedCWE-300
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2026-0583Aruba ArubaOS: Mehrere Schwachstellen

Ein Angreifer aus einem angrenzenden Netzwerk kann mehrere Schwachstellen in Aruba ArubaOS ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, Man-in-the-Middle-Angriffe durchzuführen, einen Denial-of-Service-Zustand auszulösen, vertrauliche Informationen offenzulegen oder Sitzungen zu kapern.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260311Security Bulletin 11 Mar 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 11 Mar 2026, published on 11 March 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0235Multiples vulnérabilités dans HPE Aruba Networking AOS

De multiples vulnérabilités ont été découvertes dans HPE Aruba Networking AOS. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et une atteinte à l'intégrité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-006616アルバネットワークス株式会社のArubaOSにおける中間者の問題に関する脆弱性

クライアント分離機構の脆弱性により、攻撃者はクライアント間のレイヤー2（L2）通信制限を回避し、レイヤー3（L3）でトラフィックをリダイレクトできる場合があります。この脆弱性はポリシーの強制を回避できるだけでなく、ポートスティーリング攻撃と組み合わせることで双方向の中間者攻撃（MitM）を実行可能にします。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
Upgrade Mobility Conductors, Controllers, Gateways, and Access Points to one of the following AOS-10 or AOS-8 versions (as applicable) to resolve the vulnerabilities described in the details section: - AOS-10.8.x.x: 10.8.0.1 and above (Release ETA: First half of March 2026); - AOS-10.7.x.x: 10.7.2.3 and above; - AOS-10.4.x.x: 10.4.1.11 and above; - AOS-8.13.x.x: 8.13.1.2 and above; - AOS-8.12.x.x: 8.12.0.7 and above (Release ETA: Second half of March 2026); - AOS-8.10.x.x: 8.10.0.22 and above (Release ETA: First half of March 2026). Software versions with resolution/fixes for the vulnerabilities covered above can be downloaded from the HPE Networking Support Portal at https://networkingsupport.hpe.com/globalsearch#tab=Software HPE Aruba Networking does not evaluate or patch AOS-10 and AOS-8 software branches that have reached their End of Maintenance (EoM) milestone. For more information about HPE Aruba Networking's End of Life policy visit: https://www.hpe.com/psnow/doc/a00143052enw.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 4 Mar 2026 · Last source change 1 Apr 2026, 16:21 UTC · CWE-300 · Channel Accessible by Non-Endpoint

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-9417
Product sourceVendor CSAF · HPE Networking
Remediation sourceVendor CSAF · HPE Networking
CWE sourceCISA ADP
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    10.8.0.0; 10.7.0.0 ≤ 10.7.2.2; 10.4.0.0 ≤ 10.4.1.10; 8.13.0.0 ≤ 8.13.1.1; 8.12.0.0 ≤ 8.12.0.6; 8.10.0.0 ≤ 8.10.0.21 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    10.8.0.0; 10.7.0.0 ≤ 10.7.2.2; 10.4.0.0 ≤ 10.4.1.10; 8.13.0.0 ≤ 8.13.1.1; 8.12.0.0 ≤ 8.12.0.6; 8.10.0.0 ≤ 8.10.0.21 · Fixed: Upgrade Mobility Conductors, Controllers, Gateways, and Access Points to one of the following AOS-10 or AOS-8 versions (as applicable) to resolve the vulnerabilities described in the details section: - AOS-10.8.x.x: 10.8.0.1 and above (Release ETA: First half of March 2026); - AOS-10.7.x.x: 10.7.2.3 and above; - AOS-10.4.x.x: 10.4.1.11 and above; - AOS-8.13.x.x: 8.13.1.2 and above; - AOS-8.12.x.x: 8.12.0.7 and above (Release ETA: Second half of March 2026); - AOS-8.10.x.x: 8.10.0.22 and above (Release ETA: First half of March 2026). Software versions with resolution/fixes for the vulnerabilities covered above can be downloaded from the HPE Networking Support Portal at https://networkingsupport.hpe.com/globalsearch#tab=Software HPE Aruba Networking does not evaluate or patch AOS-10 and AOS-8 software branches that have reached their End of Maintenance (EoM) milestone. For more information about HPE Aruba Networking's End of Life policy visit: https://www.hpe.com/psnow/doc/a00143052enw.
    HPE Networking ↗
  2. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    HPE Networking ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-9417↗HPE Networking security advisory↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-23811 · cve.blacktree.nl