# CVE-2026-73780 — Hewlett Packard Enterprise (HPE) AOS-CX

> As of 2026-09-03, CVE-2026-73780 is a HIGH-severity vulnerability in Hewlett Packard Enterprise (HPE) AOS-CX, CVSS v3.1 8.3, EPSS 0.1% (8.8th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-73780, most recently “HPE Patches Critical ArubaOS-CX Buffer Overflow (CVE-2026-73749) Enabling Unauthenticated Remote Code Execution”.

**Last updated:** 2026-09-03

## What is CVE-2026-73780?

A vulnerability in the web-based management interface of AOS-CX switches exposes some sessions to a lack of Cross-Site Request Forgery (CSRF) protection. This could allow a remote unauthenticated attacker to execute arbitrary input against the affected interface if the attacker can convince an authenticated user of the interface to interact with a specially crafted URL.

The record classifies CVE-2026-73780 under weakness class [CWE-352](https://intel.threadlinqs.com/cwe/CWE-352). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 54 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.3 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 8.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-01, last modified 2026-09-03

## Is CVE-2026-73780 being exploited?

It currently carries a trending score of 27 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Hewlett Packard Enterprise (HPE)](https://intel.threadlinqs.com/vendors/hewlett-packard-enterprise-hpe): AOS-CX

## How to fix CVE-2026-73780

Vendor advisory: [https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05134en_us&docLocale=en_US](https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05134en_us&docLocale=en_US). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-73780

1 tracked threat in the Threadlinqs corpus references CVE-2026-73780, either in the campaign’s CVE list or as an indicator on the campaign record.

- [HPE Patches Critical ArubaOS-CX Buffer Overflow (CVE-2026-73749) Enabling Unauthenticated Remote Code Execution](https://intel.threadlinqs.com/threat/TL-2026-2314) — CRITICAL · 2026-09-03

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [support.hpe.com](https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05134en_us&docLocale=en_US)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-73780
Full detection coverage and IOCs for threats exploiting CVE-2026-73780 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp