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CVE-2026-65643 is a critical vulnerability in cPanel & WHM domain parking and addon-domain functionality. An authenticated cPanel account authorized to add parked or addon domains can create arbitrary files on the underlying server. This arbitrary file-creation condition can be leveraged to execute code as root, compromising the entire hosting server.
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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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical authenticated arbitrary-file-creation vulnerability in cPanel & WHM domain parking and addon-domain functionality that can result in root-level code execution and complete server compromise.
An authenticated arbitrary-file-creation vulnerability in cPanel & WHM domain parking/addon-domain functionality that can be escalated to root code execution, enabling complete takeover of multi-tenant hosting servers.
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.