BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2026
CVE-2026-23599High confidence

Local Privilege Escalation Vulnerability in HPE Aruba Networking Clear Pass Policy Manager OnGuard for Linux

Hewlett Packard Enterprise (HPE) · HPE Aruba Networking ClearPass Policy Manager

7.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Medium, lowered one band.downgradedsince 18 Feb 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.15% 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 ClearPass Policy Manager 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
HPESBNW05012 · CSAF 2.0 · revision 1 · finalHPE Aruba NetworkingLocal Privilege Escalation Vulnerability in HPE Aruba Networking Clear Pass Policy Manager OnGuard for Linux
1 known affected

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

  • ClearPass Policy Manager
Summary
A local privilege-escalation vulnerability has been discovered in the HPE Aruba Networking ClearPass OnGuard Software for Linux. Successful exploitation of this vulnerability could allow a local attacker to achieve arbitrary code execution with root privileges.
Remediation
Upgrade HPE Aruba Networking ClearPass Policy Manager to one of the following versions to remediate the vulnerability noted in the Details section. HPE Aruba Networking ClearPass Policy Manager - 6.12.x: ClearPass 6.12.7 Hotfix Patch for CVE-2026-23599 and above. - 6.11.x: ClearPass 6.11.13 Hotfix Patch for CVE-2026-23599 and above. Software versions with resolution/fixes for the vulnerability covered above can be downloaded from the HPE Networking Support Portal at https://networkingsupport.hpe.com/downloads;fileTypes=SOFTWARE. Supported versions as of the publication date of this advisory are: - HPE Aruba Networking ClearPass Policy Manager 6.12.x - HPE Aruba Networking ClearPass Policy Manager 6.11.x HPE Aruba Networking does not evaluate or patch software branches that have reached their End of Maintenance (EoM) milestone. For more information about HPE Aruba Networking End of Life policy please 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-2026-8064

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 actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A local privilege-escalation vulnerability has been discovered in the HPE Aruba Networking ClearPass OnGuard Software for Linux. Successful exploitation of this vulnerability could allow a local attacker to achieve arbitrary code execution with root privileges.

What

A local privilege-escalation vulnerability has been discovered in the HPE Aruba Networking ClearPass OnGuard Software for Linux. Successful exploitation of this vulnerability could allow a local attacker to achieve arbitrary code execution with root privileges.

Why

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

What

A local privilege-escalation vulnerability has been discovered in the HPE Aruba Networking ClearPass OnGuard Software for Linux. Successful exploitation of this vulnerability could allow a local attacker to achieve arbitrary code execution with root privileges.

Why

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

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
local access → Improper Privilege Management → execute code or commands in the affected security context
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
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-269 ↗

CWE-269: Improper Privilege Management. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

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

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

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
Remote code executionCWE-269
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-0436Aruba ClearPass Policy Manager (OnGuard): Schwachstelle ermöglicht Privilegieneskalation

Ein lokaler Angreifer kann eine Schwachstelle in Aruba ClearPass Policy Manager ausnutzen, um seine Privilegien zu erhöhen und beliebigen Code mit Root-Rechten auszuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260225Security Bulletin 25 Feb 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 25 Feb 2026, published on 25 February 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0183Vulnérabilité dans HPE Aruba Networking ClearPass Policy Manager

Une vulnérabilité a été découverte dans HPE Aruba Networking ClearPass Policy Manager. Elle permet à un attaquant de provoquer une élévation de privilèges.

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
ClearPass Policy Manager
Fixed
ClearPass Policy Manager
Action
Upgrade HPE Aruba Networking ClearPass Policy Manager to one of the following versions to remediate the vulnerability noted in the Details section. HPE Aruba Networking ClearPass Policy Manager - 6.12.x: ClearPass 6.12.7 Hotfix Patch for CVE-2026-23599 and above. - 6.11.x: ClearPass 6.11.13 Hotfix Patch for CVE-2026-23599 and above. Software versions with resolution/fixes for the vulnerability covered above can be downloaded from the HPE Networking Support Portal at https://networkingsupport.hpe.com/downloads;fileTypes=SOFTWARE. Supported versions as of the publication date of this advisory are: - HPE Aruba Networking ClearPass Policy Manager 6.12.x - HPE Aruba Networking ClearPass Policy Manager 6.11.x HPE Aruba Networking does not evaluate or patch software branches that have reached their End of Maintenance (EoM) milestone. For more information about HPE Aruba Networking End of Life policy please 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 17 Feb 2026 · Last source change 18 Feb 2026, 13:43 UTC · CWE-269 · Improper Privilege Management

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-2026-8064
Product sourceVendor CSAF · HPE Aruba Networking
Remediation sourceVendor CSAF · HPE Aruba Networking
CWE sourceCISA ADP
NVD statusNVD not scheduled

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
    6.12.0 ≤ 6.12.7; 6.11.0 ≤ 6.11.13 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    6.12.0 ≤ 6.12.7; 6.11.0 ≤ 6.11.13 · Fixed: Upgrade HPE Aruba Networking ClearPass Policy Manager to one of the following versions to remediate the vulnerability noted in the Details section. HPE Aruba Networking ClearPass Policy Manager - 6.12.x: ClearPass 6.12.7 Hotfix Patch for CVE-2026-23599 and above. - 6.11.x: ClearPass 6.11.13 Hotfix Patch for CVE-2026-23599 and above. Software versions with resolution/fixes for the vulnerability covered above can be downloaded from the HPE Networking Support Portal at https://networkingsupport.hpe.com/downloads;fileTypes=SOFTWARE. Supported versions as of the publication date of this advisory are: - HPE Aruba Networking ClearPass Policy Manager 6.12.x - HPE Aruba Networking ClearPass Policy Manager 6.11.x HPE Aruba Networking does not evaluate or patch software branches that have reached their End of Maintenance (EoM) milestone. For more information about HPE Aruba Networking End of Life policy please visit https://www.hpe.com/psnow/doc/a00143052enw.
    HPE Aruba Networking ↗
  2. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    HPE Aruba 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-2026-8064↗HPE Aruba 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-2026-23599 · cve.blacktree.nl