CVE-2026-73783Network attack vector

Authenticated service interruption via API stack overflow

Published Sep 1, 2026 · Updated Sep 2, 2026

Stack overflows in an AOS-CX API endpoint allow remote authenticated users to interrupt affected switches with crafted requests. The endpoint mishandles crafted request data until its call stack overflows, but HPE has not disclosed the endpoint, request field, or faulty operation. Network access and a highly privileged authenticated account are required; the documented impact is limited to availability.

CVSS severity4.9
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflows in an AOS-CX API endpoint allow remote authenticated users to interrupt affected switches with crafted requests. The endpoint mishandles crafted request data until its call stack overflows, but HPE has not disclosed the endpoint, request field, or faulty operation. Network access and a highly privileged authenticated account are required; the documented impact is limited to availability.

The record

CVE
CVE-2026-73783
Published
Sep 1, 2026
Updated
Sep 2, 2026
Vendor
Hewlett Packard Enterprise (HPE)
Product
AOS-CX
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.10.0000 <=10.10.1180
  2. Affected versionversion=10.13.0000 <=10.13.1180
  3. Affected versionversion=10.16.0000 <=10.16.1051
  4. Affected versionversion=10.17.0000 <=10.17.1021
  5. Affected versionversion=10.18.0000 <=10.18.0001

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Hewlett Packard Enterprise (HPE) · AOS-CXversion=10.10.0000 <=10.10.1180; version=10.13.0000 <=10.13.1180; version=10.16.0000 <=10.16.1051; version=10.17.0000 <=10.17.1021; version=10.18.0000 <=10.18.0001

Published CVSS scores

4.9Hewlett Packard Enterprise (HPE)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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