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CVE-2024-20399 is an OS command injection vulnerability in the Cisco NX-OS command-line interface. Insufficient validation of arguments passed to specific configuration CLI commands allows an authenticated administrator to submit crafted input and execute arbitrary commands as root in the underlying Linux operating system, escaping the NX-OS management interface. Affected products include Cisco Nexus 3000, 5500, 5600, 6000, 7000, and standalone NX-OS-mode 9000 series switches, and MDS 9000 series switches running vulnerable releases. Velvet Ant exploited the vulnerability as a zero-day to deploy backdoor malware on compromised switches.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Cisco NX-OS zero-day vulnerability that Velvet Ant exploited to deploy the VELVETSHELL backdoor on Cisco Nexus switches.
A Cisco NX-OS vulnerability used by Velvet Ant to plant a backdoor on switches after administrative access was already obtained, functioning as a persistence mechanism rather than an initial remote compromise vector.
A Cisco NX-OS vulnerability that allows an authenticated administrator to execute arbitrary commands with root-level access via manipulated CLI input.
A CLI command injection vulnerability in Cisco NX-OS switches.
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.