EUVD-2026-94461
GHSA-cw8g-p542-fwjp
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated crafted HTTP request to a network-facing NX-API endpoint (AV:N/AC:L/PR:N/UI:N) yields root code execution and device reload, giving full C:H/I:H/A:H; non-default feature-gating does not alter base metrics.
Primary rating from Vendor (cisco).
CVSS VectorVendor: cisco
Lifecycle Timeline
2DescriptionCVE.org
A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device.
The vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API of an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a reload of the device and a DoS condition.
AnalysisAI
Unauthenticated remote code execution in the NX-API feature of Cisco NX-OS Software lets a remote attacker who can reach the NX-API listener run arbitrary code with root privileges, or crash processes hard enough to force a device reload (DoS), by sending a single crafted HTTP request. Exposure is conditional: NX-API is an optional, non-default feature, so only NX-OS devices and UCS-managed systems where it has been explicitly enabled are vulnerable to an attacker with routing access to the management/HTTP endpoint; the CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms no credentials or user interaction are required once that exposure exists. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the NX-API feature be enabled on the target Cisco NX-OS (or UCS-managed) device - NX-API is an optional, non-default feature, so devices without it configured are not exposed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority vulnerability, not a high-CVSS-but-low-risk inflation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Cisco's advisory at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-napi-rce-r2shwu2j is the authoritative source for fixed NX-OS and UCS-managed releases; no specific patched version number is provided in this record, so treat this as vendor advisory-driven remediation (upgrade to the listed fixed release for your platform) rather than assuming a version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Cisco NX-OS devices and UCS-managed systems, identify which have the optional NX-API feature enabled, and immediately restrict reachability to the NX-API listener to trusted management networks through ACLs, firewall rules, or out-of-band access; if NX-API is not business-required, disable it. …
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External POC / Exploit Code
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