CVE-2026-41709ESX Vulnerability
VMware ESX contains an insufficient logging vulnerability.
Published Jul 30, 2026 · Updated Oct 29, 2026
Key Facts
Patch immediately- CVE-2026-41709 is a low-severity vulnerability (CVSS 2.7 v3.1) affecting Cloud Foundation, ESX, Telco Cloud Platform and 1 more product.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 27, 2026. A public exploit is reported by tracking sources, but no code link is listed yet.
- EPSS estimates a 0.3% probability of exploitation in the next 30 days.
- Fixed versions are available, including Cloud Foundation 5.2.4, ESX ESXi-9.0.2.0100-25595025, ESX ESXi-9.1.0.0-25370933.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
2.7
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
EPSS (30-day exploit likelihood)
0.3%
Higher than 22.2% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
38/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Oct 28, 2026
90 days after publication
Federal due date
Nov 11, 2026
13 days left
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Required action (CISA): Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Description
VMware ESX contains an insufficient logging vulnerability. A malicious administrator could exploit this issue to perform certain operations without them being logged.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 28, 2026 | Nov 11, 2026 | Not reported |
| Industry KEV feed | Oct 27, 2026 | Nov 11, 2026 | Not reported |
| CIRCL KEV | Oct 28, 2026 | Nov 11, 2026 | Not reported |
| ENISA EUVD | Oct 28, 2026 | n/a | Not reported |
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Cloud Foundation | >= 9.1.x.x | 5.2.4 |
| ESX | >= 9.1.x.x | ESXi-9.1.0.0-25370933 |
| Telco Cloud Platform | >= 5.1.x | n/a |
| vSphere Foundation | >= 9.1.x.x | n/a |
Patched Releases
Cloud Foundation
5.2.4
ESX
ESXi-9.0.2.0100-25595025, ESXi-9.1.0.0-25370933, ESXi80U3j-25429389
Timeline
Publicly disclosed
Jul 30, 2026
Added to Industry KEV feed
Oct 27, 2026
Added to CISA KEV
Oct 28, 2026
Added to CIRCL KEV
Oct 28, 2026
Added to ENISA EUVD
Oct 28, 2026
Last updated
Oct 29, 2026
Weakness Type
- CWE-778 Insufficient Logging
References
FAQ
Common Questions.
VMware ESX contains an insufficient logging vulnerability.
Affected: Cloud Foundation versions >= 9.1.x.x; ESX versions >= 9.1.x.x; Telco Cloud Platform versions >= 5.1.x, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 27, 2026.
Yes. It was added on Oct 28, 2026 with a federal remediation due date of Nov 11, 2026.
A public exploit is reported by tracking sources, but no code link is listed yet.
Fixed versions are available, including Cloud Foundation 5.2.4, ESX ESXi-9.0.2.0100-25595025, ESX ESXi-9.1.0.0-25370933.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-41709 On Your Attack Surface?
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