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CVE-2026-19766 is a critical improper-authentication vulnerability in the underlying operating system of HPE Networking Fabric Composer. The flaw can permit an unauthenticated attacker on an adjacent network to bypass authentication and execute arbitrary code as a privileged operating-system user, potentially resulting in complete compromise of the Fabric Composer host.
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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.
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.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability covered by HPE bulletin HPESBNW05133 that can enable privileged code execution from an adjacent network, subject to unspecified required conditions.
A CVSS 9.6 adjacent-network authentication-bypass vulnerability in HPE Networking Fabric Composer that allows an unauthenticated attacker on a connected network segment to execute code with privileged operating-system permissions.
A CVSS 9.6 adjacent-network authentication-bypass vulnerability in HPE Networking Fabric Composer that can allow an unauthenticated attacker on a connected network segment to execute arbitrary code with privileged operating-system permissions.
An authentication-bypass vulnerability affecting the underlying operating system of HPE Networking Fabric Composer. An unauthenticated adjacent attacker could exploit it to execute arbitrary code with privileged-user permissions, completely compromising the AFC host.
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.