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CVE-2026-59309 is a critical authentication bypass vulnerability in VMware Directory Service affecting VMware vCenter. An attacker with network access to a targeted vCenter instance can exploit the flaw to bypass normal authentication controls and obtain unauthorized access without valid credentials. The issue is described as affecting the authentication boundary of vCenter through the VMware Directory Service component and is rated CVSS 9.8.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical VMware vCenter authentication bypass vulnerability that can allow unauthorized access to the targeted system.
A critical authentication bypass vulnerability in VMware vCenter's Directory Service that could allow an attacker with network access to bypass authentication and gain unauthorized access.
A VMware vCenter authentication bypass vulnerability that can allow unauthorized access to the system.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.