# CVE-2026-93952 — Arista Networks VeloCloud Orchestrator (VCO) On-Prem

**CISA KEV**

> As of 2026-09-23, CVE-2026-93952 is a CRITICAL-severity vulnerability in Arista Networks VeloCloud Orchestrator (VCO) On-Prem, CVSS v3.1 10, EPSS 1.0% (63.2th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-09-22), with a US federal remediation deadline of 2026-09-25. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-93952, most recently “CISA Adds Four Actively Exploited KEVs: Check Point Gateway/Management RCE Flaws, Arista VeloCloud Orchestrator Auth Bypass, F5 BIG-IP APM Heap Overflow”.

**Last updated:** 2026-09-23

## What is CVE-2026-93952?

VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator. Hosted, including Dedicated, versions of VCO were impacted and have already been patched.

The record classifies CVE-2026-93952 under weakness class [CWE-20](https://intel.threadlinqs.com/cwe/CWE-20). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 13 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 10 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **CVSS v4.0 base score:** 9.5 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **EPSS (FIRST):** 1.0% probability of exploitation in the next 30 days, higher than 63.2% of all scored CVEs
- **CISA KEV:** Listed since 2026-09-22, federal remediation deadline 2026-09-25
- **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- **Published:** 2026-09-22, last modified 2026-09-23

## Is CVE-2026-93952 being exploited?

CISA added CVE-2026-93952 to the Known Exploited Vulnerabilities catalog on 2026-09-22, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-09-25 under BOD 22-01. It currently carries a trending score of 55 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Arista Networks](https://intel.threadlinqs.com/vendors/arista-networks): VeloCloud Orchestrator (VCO) On-Prem

## How to fix CVE-2026-93952

Vendor advisory: [https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183](https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183). Because CVE-2026-93952 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-09-25. 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-2026-93952

1 tracked threat in the Threadlinqs corpus references CVE-2026-93952, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CISA Adds Four Actively Exploited KEVs: Check Point Gateway/Management RCE Flaws, Arista VeloCloud Orchestrator Auth Bypass, F5 BIG-IP APM Heap Overflow](https://intel.threadlinqs.com/threat/TL-2026-2678) — CRITICAL · 2026-09-26

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-27. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [arista.com — vendor advisory](https://www.arista.com/en/support/advisories-notices/security-advisory/24765-security-advisory-0183)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-93952
Full detection coverage and IOCs for threats exploiting CVE-2026-93952 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp