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Attackers Exploit VMware vCenter Vulnerability to Gain Persistent Remote Access

Attackers actively exploit critical VMware vCenter flaw CVE-2026-59310, installing reverse_ssh backdoors on 361 hosts across 47 countries.

QUIRSO observed active exploitation of CVE-2026-59310 (CVSS 9.8), a directory-traversal flaw in VMware vCenter allowing arbitrary code execution, patched by Broadcom in late July. Attack chains deploy a malicious cron job running the open-source reverse_ssh tool for persistence, with compromised systems phoning home starting August 3, five days after disclosure. Forensics show 361 unique victim IPs in 47 countries, mostly Germany, the U.S., Turkey, Iran, and France, with the actor suspected to be an APT. Separately, Defused Cyber reports rising scanning indicative of exploitation of related CVE-2026-59309, an unauthenticated auth bypass in vmdir.

The Hacker News · Aug 12, 2026Exploit / PoC in the wildCVE-2026-59310CVE-2026-593091

vCenter Flaw Exploited Just Five Days After Disclosure

Attackers began exploiting critical vCenter flaw CVE-2026-59310 five days after Broadcom's disclosure, putting enterprise VMware deployments at risk.

Attackers exploited a critical-severity flaw in VMware vCenter, tracked as CVE-2026-59310, just five days after Broadcom disclosed it. vCenter is the management platform for large enterprise VMware virtualization estates, so active exploitation exposes a broad installed base. Defenders running vCenter should prioritize applying Broadcom's patch.

Infosecurity Magazine · Aug 13, 2026Exploit / PoC in the wildCVE-2026-59310