CVE-2026-41709: Broadcom VMWare ESX Insufficient Logging Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 28 Oct 2026, 90 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 0.3%
EPSS score, percentile 22.3 of all scored records
- How severe?
- 2.7 Low
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline 11 Nov 2026. Apply mitigations in accordance with vendor instructions … Full text
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 9.1.x.x
- 9.0.x.x
- from 5.x to before 5.2.4
- 9.1.x.x
- 9.0.x.x
- from 9.1.x.x to before ESXi-9.1.0.0-25370933
and 4 more in the table below
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by 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.
CISA due date for this action: 11 November 2026.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/38017
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-41709
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | 9.1.x.x |
| Affected | 9.0.x.x |
| Affected | from 5.x to before 5.2.4 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | 9.1.x.x |
| Affected | 9.0.x.x |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from 9.1.x.x to before ESXi-9.1.0.0-25370933 |
| Affected | from 9.0.x.x to before ESXi-9.0.2.0100-25595025 |
| Affected | from 8.0 to before ESXi80U3j-25429389 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | 5.1.x |
| Affected | 5.0.x |
Versions not listed are: unaffected.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
Broadcom VMWare ESX contains an insufficient logging vulnerability that could allow a malicious actor with admin access to perform certain operations without being logged.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2026-41709 to its Known Exploited Vulnerabilities (KEV) catalog on 28 Oct 2026.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 11 Nov 2026.
- The CVE record was published on 30 Jul 2026, 90 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 2.7 (Low), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.3% (percentile 22.3), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact partial.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-778: Insufficient logging
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 30 Jul 2026 | CVE record published |
| 30 Jul 2026 | CVE record last updated |
| 28 Oct 2026 | Added to CISA KEV |
| 11 Nov 2026 | CISA due date for the required action |
References
More exploited Broadcom vulnerabilities
- CVE-2026-59310: Broadcom VMware vCenter Path Traversal Vulnerability
- CVE-2026-22719: Broadcom VMware Aria Operations Command Injection Vulnerability
- CVE-2024-37079: Broadcom VMware vCenter Server Out-of-bounds Write Vulnerability
- CVE-2025-41244: Broadcom VMware Aria Operations and VMware Tools Privilege Defined with Unsafe Actions Vulnerability
- CVE-2025-1976: Broadcom Brocade Fabric OS Code Injection Vulnerability