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Exploited vulnerability · CISA KEV

Is CVE-2026-41709 exploited? Yes: in CISA KEV since 28 Oct 2026

Gociux · Broadcom VMware ESX · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-41709, Broadcom VMWare ESX Insufficient Logging Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 28 Oct 2026, 90 days after it was published. It affects Broadcom VMware ESX. If you run it, CISA's required action is: 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.

exploitedYesCISA KEV · 28 Oct 2026
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity2.7CVSS 3.1 · low
US federal due11 Nov 2026BOD 22-01 deadline

What it is

Broadcom VMWare ESX contains an insufficient logging vulnerability that could allow a malicious actor with admin access to perform certain operations without being logged.

VendorBroadcom (6 exploited CVEs in KEV)
ProductVMware ESX
VulnerabilityBroadcom VMWare ESX Insufficient Logging Vulnerability
WeaknessCWE-778
Published30 Jul 2026
Added to KEV28 Oct 2026
Reported by (CNA)vmware

What to do

  1. Check whether you run it. Look for VMware ESX in your asset inventory, including appliances and cloud images. Stack check lists every exploited Broadcom CVE at once.
  2. Apply the fix. 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.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 30 Jul 2026.
  4. Get told next time. Email alerts when CISA adds a CVE for Broadcom.

References

Questions

Is CVE-2026-41709 being exploited?

Yes. CISA added CVE-2026-41709 to the Known Exploited Vulnerabilities catalog on 28 Oct 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2026-41709 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2026-41709?

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. Check Broadcom's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected VMware ESX and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in October 2026 · Broadcom scorecard · act-now radar.

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