Vulnerability Intelligence Report
Cisco NX-OS Software NX-API Remote Code Execution Vulnerability
CVE-2026-76471
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.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-122 ↗Heap-based Buffer Overflow
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Cisco | Cisco NX-OS Software | 9.2(3) (affected), 9.2(2v) (affected), 9.2(1) (affected), 9.2(2t) (affected), 9.2(3y) (affected), 9.3(2) (affected), 9.2(4) (affected), 9.3(1) (affected), 9.3(1z) (affected), 9.2(2) (affected), 9.3(3) (affected), 9.3(4) (affected), 9.3(5) (affected), 9.3(6) (affected), 9.3(5w) (affected), 9.3(7) (affected), 9.3(7k) (affected), 9.3(7a) (affected), 9.3(8) (affected), 9.3(9) (affected), 9.3(10) (affected), 10.3(1) (affected), 10.3(2) (affected), 9.3(11) (affected), 10.3(3) (affected), 9.3(12) (affected), 10.4(1) (affected), 10.3(99w) (affected), 10.3(3w) (affected), 10.3(99x) (affected), 10.3(3o) (affected), 10.3(4) (affected), 10.3(3p) (affected), 10.3(4a) (affected), 10.4(2) (affected), 10.3(3q) (affected), 9.3(13) (affected), 10.3(5) (affected), 10.4(3) (affected), 10.3(3x) (affected), 10.3(4g) (affected), 10.5(1) (affected), 10.3(3r) (affected), 10.3(6) (affected), 9.3(14) (affected), 10.4(4) (affected), 10.3(4h) (affected), 10.5(2) (affected), 10.3(7) (affected), 10.4(5) (affected), 10.5(3) (affected), 9.3(15) (affected), 10.4(4g) (affected), 10.5(4) (affected), 10.6(1) (affected), 10.5(3t) (affected), 10.3(8) (affected), 10.4(6) (affected), 10.5(3s) (affected), 10.5(3e) (affected), 10.5(3o) (affected), 9.3(16) (affected), 10.6(1s) (affected), 10.6(2) (affected), 10.5(3p) (affected), 10.3(9) (affected), 10.6(2s) (affected), 10.6(3) (affected), 10.4(7) (affected), 10.5(5) (affected), 9.3(17) (affected), 10.6(2n) (affected), 10.6(3s) (affected) |
| Cisco | Cisco Unified Computing System (Managed) | 4.0(1a) (affected), 4.1(1d) (affected), 4.0(4f) (affected), 4.0(4a) (affected), 4.0(4e) (affected), 4.0(4c) (affected), 4.0(4h) (affected), 4.1(1c) (affected), 4.0(2a) (affected), 4.1(1e) (affected), 4.1(2a) (affected), 4.0(2b) (affected), 4.0(1b) (affected), 4.0(4d) (affected), 4.0(2e) (affected), 4.1(1a) (affected), 4.0(4g) (affected), 4.0(1c) (affected), 4.0(1d) (affected), 4.0(4b) (affected), 4.0(4i) (affected), 4.0(2d) (affected), 4.1(1b) (affected), 4.1(2b) (affected), 4.0(4k) (affected), 4.1(3a) (affected), 4.1(3b) (affected), 4.1(2c) (affected), 4.0(4l) (affected), 4.1(4a) (affected), 4.1(3c) (affected), 4.1(3d) (affected), 4.2(1c) (affected), 4.2(1d) (affected), 4.0(4m) (affected), 4.1(3e) (affected), 4.2(1f) (affected), 4.1(3f) (affected), 4.2(1i) (affected), 4.1(3h) (affected), 4.2(1k) (affected), 4.2(1l) (affected), 4.0(4n) (affected), 4.2(1m) (affected), 4.1(3i) (affected), 4.2(2a) (affected), 4.2(1n) (affected), 4.1(3j) (affected), 4.2(2c) (affected), 4.2(2d) (affected), 4.2(3b) (affected), 4.1(3k) (affected), 4.0(4o) (affected), 4.2(2e) (affected), 4.2(3d) (affected), 4.2(3e) (affected), 4.2(3g) (affected), 4.1(3l) (affected), 4.3(2b) (affected), 4.2(3h) (affected), 4.2(3i) (affected), 4.3(2c) (affected), 4.1(3m) (affected), 4.3(2e) (affected), 4.3(3a) (affected), 4.2(3j) (affected), 4.3(3c) (affected), 4.3(4a) (affected), 4.2(3k) (affected), 4.3(4b) (affected), 4.3(4c) (affected), 4.2(3l) (affected), 4.3(4d) (affected), 4.3(2f) (affected), 4.2(3m) (affected), 4.3(5a) (affected), 4.3(4e) (affected), 4.1(3n) (affected), 4.3(4f) (affected), 4.2(3n) (affected), 4.3(5c) (affected), 4.2(3o) (affected), 4.3(5d) (affected), 4.3(6a) (affected), 4.3(6b) (affected), 4.3(5e) (affected), 4.3(6c) (affected), 4.2(3p) (affected), 4.3(6d) (affected), 4.3(6e) (affected), 4.3(6f) (affected), 4.2(3r) (affected), 4.3(6g) (affected), 4.3(6h) (affected), 4.2(3s) (affected), 4.3(6i) (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Cisco Systems, Inc. · Hosted Service · USA |
| Reserved | 2026-08-19T12:02:03 |
| Published | 2026-10-07T16:15:35 |
| Last Updated | 2026-10-08T03:55:32 |
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