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CVE-2026-59309 is a critical authentication-bypass vulnerability in VMware vCenter's VMware Directory Service (vmdir). A remote attacker with network access to an affected vCenter instance can bypass normal authentication controls and obtain unauthorized access to the vCenter environment. The vulnerability has a CVSS v3.1 score of 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.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
111 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A pre-authentication VMware vCenter vulnerability, described as an authentication-bypass flaw with a 9.8 severity rating.
Critical authentication-bypass vulnerability in VMware vCenter Directory Service, patched alongside CVE-2026-59310.
A VMware vCenter vulnerability mentioned only as contextual background; the content states it was actively exploited by threat actors.
A VMware vCenter vulnerability mentioned as recently actively exploited; no technical vulnerability details are provided.
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.