Vulnerability report

Exploitation attempts observed in the wild Confirmed confidence In CISA KEV

CVE-2026-41709

ESX insufficient logging vulnerability

VMware / Cloud Foundation · 9.1.x.x

Watch CVE-2026-41709 Browse KEV feed
Severity
CVSS 2.7 · Low
Confidence
Confirmed
Exploit status
Exploitation attempts observed in the wild
EPSS
0.3%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-41709 is ESX insufficient logging vulnerability affecting VMware Cloud Foundation and 3 other products. VMware ESX contains an insufficient logging vulnerability. A malicious administrator could exploit this...

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

VMware / Cloud Foundation 9.1.x.x.

What should we do?

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

Overview

ESX insufficient logging vulnerability

VMware ESX contains an insufficient logging vulnerability. A malicious administrator could exploit this issue to perform certain operations without them being logged.

VMware Affected
Cloud Foundation
9.1.x.x 9.0.x.x Before 5.2.4
VMware Affected
vSphere Foundation
9.1.x.x 9.0.x.x
VMware Affected
ESX
Before ESXi-9.1.0.0-25370933 Before ESXi-9.0.2.0100-25595025 Before ESXi80U3j-25429389
VMware Affected
Telco Cloud Platform
5.1.x 5.0.x
Published
30 Jul 2026
Exploitation Attempts Reported
28 Oct 2026
Attack vector
Remote
Complexity
Low
Privileges
High
User interaction
None

Tags

cisa

CVE References

Exploitation evidence

Evidence of exploitation attempts

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

Exploitation attempts observed in the wild

CrowdStrike

Recorded 28 Oct 2026

A trusted third party reported exploitation attempts.

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
CrowdStrike First 2026-10-28 15:24 UTC
CISA 2026-10-28 19:50 UTC

Detection

Operational artifacts and observed signals

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

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 v3.1

2.7 Low

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

0.3%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Insufficient Logging CWE-778

Timeline

From disclosure to observed exploitation attempts

  1. 19:50 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. 15:24 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party report of exploitation attempts

  3. 12:45 UTC

    CVE published

    Vulnerability disclosed publicly

  4. 06:21 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-2026-41709

Sample API response 
{
  "cve_id": "CVE-2026-41709",
  "confidence": "Confirmed",
  "cvss_score": 2.7,
  "cvss_estimated": false,
  "epss_score": 0.00297,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}