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HPE AOS-CX CVE-2026-73771

| EUVDEUVD-2026-69634 HIGH
Improper Authentication (CWE-287)
2026-09-01 hpe GHSA-52m6-rvmf-29g3
7.5
CVSS 3.1 · Vendor: hpe
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Severity by source

Vendor (hpe) PRIMARY
7.5 HIGH
AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI
7.5 HIGH

Network-accessible management API, no authentication required, but high complexity and user interaction (likely race or active-session dependency) constrain exploitation; full management access on auth bypass success.

3.1 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (hpe).

CVSS VectorVendor: hpe

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 01, 2026 - 21:08 vuln.today
CVE Published
Sep 01, 2026 - 20:28 cve.org
HIGH 7.5

DescriptionCVE.org

An authentication vulnerability exists in the AOS-CX management interface and API that may allow improper authentication processing. An unauthenticated remote attacker could exploit this vulnerability under specific conditions to bypass authentication controls or exhaust system resources. Successful exploitation could result in unauthorized access or denial of service affecting the management interface.

AnalysisAI

Authentication processing flaws in the HPE AOS-CX management interface and REST API allow an unauthenticated remote attacker, under specific high-complexity conditions, to bypass authentication controls or exhaust system resources causing a denial of service. Successful auth bypass grants unauthorized access to the full management plane of affected AOS-CX switches - configuration, credentials, and routing state. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Network reachability to the AOS-CX management interface or REST API is required. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.5 with AC:H and UI:R significantly moderates what would otherwise be a critical unauthenticated auth-bypass. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the firmware patch specified in HPE Security Bulletin HPESBNW05134 at https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05134en_us&docLocale=en_US - the exact fixed version must be confirmed from that bulletin, as it is not present in available data. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify and inventory all HPE AOS-CX switches running in production environments and immediately restrict network access to their management interfaces using firewall ACLs or network segmentation to permit connections only from trusted administrative systems. …

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CVE-2026-73771 vulnerability details – vuln.today

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