CriticalActively exploited vulnerabilityOct 29, 2026

Hackers Exploit VMware Zero-Day Flaw to Hide Server Activity

Security authorities have confirmed that hackers are actively exploiting a zero-day vulnerability in Broadcom VMware ESX to tamper with audit trails. Cyber espionage actors have weaponized this security flaw to conceal their activity during targeted attacks. Businesses relying on VMware virtual infrastructure face the risk of undetected network compromise if their systems remain unaddressed.

Actively exploited vulnerability security briefing

Who is affected

Organizations running Broadcom VMware ESX environments, particularly professional service firms such as legal organizations, are at risk.

How to mitigate it

  1. 1Identify and inventory all Broadcom VMware ESX servers deployed across your organization.
  2. 2Review security guidance from Broadcom regarding CVE-2026-41709 and apply vendor updates immediately.
  3. 3Examine VMware server audit logs and monitoring feeds for anomalies or evidence of log suppression.
  4. 4Isolate VMware ESX management interfaces to ensure they are accessible only via secured, restricted administrative networks.

How Outsource IT solves this

Our Managed Cybersecurity & Threat Protection delivers 24/7 SOC monitoring and threat detection to spot intrusions even when attackers try to manipulate audit trails.

Managed Cybersecurity & Threat Protection

Tags

VMwareZero-DayCyber EspionageServer Security

Source advisory: the-hacker-news

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