Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2026-93952

Security Advisory 0183

Arista Networks / VeloCloud Orchestrator (VCO) On-Prem · 5.2.0 to <= 5.2.3.15

View live feed Monitor via API Watch CVE-2026-93952
Severity
CVSS 9.5 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
0.7%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-93952 is an unauthenticated Security Advisory 0183 affecting Arista Networks VeloCloud Orchestrator (VCO) On-Prem. VeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Arista Networks / VeloCloud Orchestrator (VCO) On-Prem 5.2.0 to <= 5.2.3.15.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Security Advisory 0183

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.

Arista Networks Affected
VeloCloud Orchestrator (VCO) On-Prem
Through 5.2.3.15 Through 6.1.3.7 Through 6.4.2.7 Through 7.0.0.2
View vendor advisory (opens in new tab)
Published
22 Sep 2026
Exploitation Reported
22 Sep 2026
Attack vector
Remote
Complexity
High
Privileges
None
User interaction
None

Tags

cisa

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-93952
  • Security Advisory 0183 arista.com · Vendor Advisory https://www.arista.com/en/support/advisories-notices/security-advisor...

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

Arista

Recorded 22 Sep 2026

A trusted third party reported exploitation.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
Arista First 2026-09-22 10:06 UTC
The Hacker News 2026-09-22 13:31 UTC
TheHackerNews 2026-09-22 14:22 UTC
CISA 2026-09-22 19:50 UTC
CVE 2026-09-22 20:01 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

9.5 Critical
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

0.7%

Weaknesses

Improper Input Validation CWE-20

Recent mention · The Hacker News

New CVSS 10.0 VeloCloud Orchestrator Flaw Actively Exploited in Certificate-Based Setups

Swati KhandelwalSep 22, 2026Vulnerability / Network Security Attackers are exploiting a new flaw in on-premises VeloCloud Orchestrator (VCO), the server that manages the Edge devices in a VeloCloud SD-WAN, Arista said on September 22. The flaw, tracked as CVE-2026-93952, may...

Read full advisory

All CVSS Scores

CVSS v4.0 9.5 Critical

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

CVSS v3.1 10.0 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

All Mentions

Recent mention · The Hacker News

New CVSS 10.0 VeloCloud Orchestrator Flaw Actively Exploited in Certificate-Based Setups

The Hacker News · 22 Sep 2026

Swati KhandelwalSep 22, 2026Vulnerability / Network Security Attackers are exploiting a new flaw in on-premises VeloCloud Orchestrator (VCO), the server that manages the Edge devices in a VeloCloud SD-WAN, Arista said on September 22. The flaw, tracked as CVE-2026-93952, may allow a remote attacker with no login access to privilege internal functions and affect the VCO host. Only orchestrators set up to authenticate their Edges with certificates are exposed. As of September 22, fixed releases are out for the 5.2 and 6.4 release trains, but not yet for the 6.1 and 7.0 trains. Arista has...

Recent mention · Arista

Security Advisory 0183

Arista · 21 Sep 2026

Date: September 22, 2026 Revision Date Changes 1.0 September 22, 2026 Initial release The CVE-ID tracking this issue: CVE-2026-93952 CVSSv3.1 Base Score: 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSSv4.0 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) Common Weakness Enumeration: CWE-20: Improper Input Validation This vulnerability is being tracked by BUG1907167, and BUG1937417. Description VeloCloud Orchestrator (VCO) on-pre ...

Timeline

From disclosure to observed exploitation

  1. 20:01 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  2. 19:50 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. 14:22 UTC

    KEV confirmed by TheHackerNews

    Exploitation attested by an external source

  4. 13:31 UTC

    KEV confirmed by The Hacker News

    Exploitation attested by an external source

  5. 10:06 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  6. 07:37 UTC

    CVE published

    Vulnerability disclosed publicly

  7. 01:37 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-93952

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-93952",
  "confidence": "Confirmed",
  "cvss_score": 9.5,
  "cvss_estimated": false,
  "epss_score": 0.00741,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}