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CVE-2026-76657 is a critical authentication-bypass vulnerability in the API of HPE Networking Fabric Composer. The flaw permits an unauthenticated remote attacker to circumvent existing API authentication controls and obtain administrative privileges. The specific affected API endpoint and underlying implementation defect have not been disclosed. Affected deployments include Fabric Composer 7.3.3 and earlier.
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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.
Maximum-severity authentication-bypass vulnerability in HPE Networking Fabric Composer that allows unauthenticated remote attackers to obtain administrative privileges through the API.
A maximum-severity API authentication-bypass vulnerability in HPE Networking Fabric Composer that enables unauthenticated remote administrative access and could result in complete host takeover.
A maximum-severity API authentication-bypass vulnerability in HPE Networking Fabric Composer that permits unauthenticated remote administrative access and potential full host takeover.
An authentication-bypass vulnerability in the HPE Networking Fabric Composer API that may permit an unauthenticated remote attacker to obtain administrative privileges and fully compromise the Fabric Composer 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.