CVE-2026-41709: in the CISA KEV catalogue
Broadcom VMWare ESX Insufficient Logging Vulnerability. CISA added CVE-2026-41709 to the Known Exploited Vulnerabilities catalogue on 2026-10-28 with a default due date of 2026-11-11. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Broadcom VMWare ESX contains an insufficient logging vulnerability that could allow a malicious actor with admin access to perform certain operations without being logged. (CISA description)
- Vendor / product
- Broadcom VMware ESX
- CWE
- CWE-778
- CISA 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.
- EPSS
- 0.69%, percentile 52 (scored 2026-11-03)
EPSS puts about 6.9 in 1,000 odds (0.69%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 52% of scored CVEs. Most CVEs score under 1%, so a high percentile can sit on a small probability: read the percentage first.
Vendor and reference links (from CISA)
- 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
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2026-41709 in the CISA KEV catalogue?
Yes. CISA added CVE-2026-41709 (Broadcom VMWare ESX Insufficient Logging Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2026-10-28. CISA's default due date for it is 2026-11-11.
Is CVE-2026-41709 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2026-41709. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2026-41709?
CISA's 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.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2026-41709