CVE-2026-76471 vulnerability in Cisco Products
Published on October 7, 2026
Cisco NX-OS Software NX-API Remote Code Execution Vulnerability
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.
Vulnerability Analysis
CVE-2026-76471 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Products Associated with CVE-2026-76471
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Affected Versions
Cisco NX-OS Software:- Version 9.2(3) is affected.
- Version 9.2(2v) is affected.
- Version 9.2(1) is affected.
- Version 9.2(2t) is affected.
- Version 9.2(3y) is affected.
- Version 9.3(2) is affected.
- Version 9.2(4) is affected.
- Version 9.3(1) is affected.
- Version 9.3(1z) is affected.
- Version 9.2(2) is affected.
- Version 9.3(3) is affected.
- Version 9.3(4) is affected.
- Version 9.3(5) is affected.
- Version 9.3(6) is affected.
- Version 9.3(5w) is affected.
- Version 9.3(7) is affected.
- Version 9.3(7k) is affected.
- Version 9.3(7a) is affected.
- Version 9.3(8) is affected.
- Version 9.3(9) is affected.
- Version 9.3(10) is affected.
- Version 10.3(1) is affected.
- Version 10.3(2) is affected.
- Version 9.3(11) is affected.
- Version 10.3(3) is affected.
- Version 9.3(12) is affected.
- Version 10.4(1) is affected.
- Version 10.3(99w) is affected.
- Version 10.3(3w) is affected.
- Version 10.3(99x) is affected.
- Version 10.3(3o) is affected.
- Version 10.3(4) is affected.
- Version 10.3(3p) is affected.
- Version 10.3(4a) is affected.
- Version 10.4(2) is affected.
- Version 10.3(3q) is affected.
- Version 9.3(13) is affected.
- Version 10.3(5) is affected.
- Version 10.4(3) is affected.
- Version 10.3(3x) is affected.
- Version 10.3(4g) is affected.
- Version 10.5(1) is affected.
- Version 10.3(3r) is affected.
- Version 10.3(6) is affected.
- Version 9.3(14) is affected.
- Version 10.4(4) is affected.
- Version 10.3(4h) is affected.
- Version 10.5(2) is affected.
- Version 10.3(7) is affected.
- Version 10.4(5) is affected.
- Version 10.5(3) is affected.
- Version 9.3(15) is affected.
- Version 10.4(4g) is affected.
- Version 10.5(4) is affected.
- Version 10.6(1) is affected.
- Version 10.5(3t) is affected.
- Version 10.3(8) is affected.
- Version 10.4(6) is affected.
- Version 10.5(3s) is affected.
- Version 10.5(3e) is affected.
- Version 10.5(3o) is affected.
- Version 9.3(16) is affected.
- Version 10.6(1s) is affected.
- Version 10.6(2) is affected.
- Version 10.5(3p) is affected.
- Version 10.3(9) is affected.
- Version 10.6(2s) is affected.
- Version 10.6(3) is affected.
- Version 10.4(7) is affected.
- Version 10.5(5) is affected.
- Version 9.3(17) is affected.
- Version 10.6(2n) is affected.
- Version 10.6(3s) is affected.
- Version 4.0(1a) is affected.
- Version 4.1(1d) is affected.
- Version 4.0(4f) is affected.
- Version 4.0(4a) is affected.
- Version 4.0(4e) is affected.
- Version 4.0(4c) is affected.
- Version 4.0(4h) is affected.
- Version 4.1(1c) is affected.
- Version 4.0(2a) is affected.
- Version 4.1(1e) is affected.
- Version 4.1(2a) is affected.
- Version 4.0(2b) is affected.
- Version 4.0(1b) is affected.
- Version 4.0(4d) is affected.
- Version 4.0(2e) is affected.
- Version 4.1(1a) is affected.
- Version 4.0(4g) is affected.
- Version 4.0(1c) is affected.
- Version 4.0(1d) is affected.
- Version 4.0(4b) is affected.
- Version 4.0(4i) is affected.
- Version 4.0(2d) is affected.
- Version 4.1(1b) is affected.
- Version 4.1(2b) is affected.
- Version 4.0(4k) is affected.
- Version 4.1(3a) is affected.
- Version 4.1(3b) is affected.
- Version 4.1(2c) is affected.
- Version 4.0(4l) is affected.
- Version 4.1(4a) is affected.
- Version 4.1(3c) is affected.
- Version 4.1(3d) is affected.
- Version 4.2(1c) is affected.
- Version 4.2(1d) is affected.
- Version 4.0(4m) is affected.
- Version 4.1(3e) is affected.
- Version 4.2(1f) is affected.
- Version 4.1(3f) is affected.
- Version 4.2(1i) is affected.
- Version 4.1(3h) is affected.
- Version 4.2(1k) is affected.
- Version 4.2(1l) is affected.
- Version 4.0(4n) is affected.
- Version 4.2(1m) is affected.
- Version 4.1(3i) is affected.
- Version 4.2(2a) is affected.
- Version 4.2(1n) is affected.
- Version 4.1(3j) is affected.
- Version 4.2(2c) is affected.
- Version 4.2(2d) is affected.
- Version 4.2(3b) is affected.
- Version 4.1(3k) is affected.
- Version 4.0(4o) is affected.
- Version 4.2(2e) is affected.
- Version 4.2(3d) is affected.
- Version 4.2(3e) is affected.
- Version 4.2(3g) is affected.
- Version 4.1(3l) is affected.
- Version 4.3(2b) is affected.
- Version 4.2(3h) is affected.
- Version 4.2(3i) is affected.
- Version 4.3(2c) is affected.
- Version 4.1(3m) is affected.
- Version 4.3(2e) is affected.
- Version 4.3(3a) is affected.
- Version 4.2(3j) is affected.
- Version 4.3(3c) is affected.
- Version 4.3(4a) is affected.
- Version 4.2(3k) is affected.
- Version 4.3(4b) is affected.
- Version 4.3(4c) is affected.
- Version 4.2(3l) is affected.
- Version 4.3(4d) is affected.
- Version 4.3(2f) is affected.
- Version 4.2(3m) is affected.
- Version 4.3(5a) is affected.
- Version 4.3(4e) is affected.
- Version 4.1(3n) is affected.
- Version 4.3(4f) is affected.
- Version 4.2(3n) is affected.
- Version 4.3(5c) is affected.
- Version 4.2(3o) is affected.
- Version 4.3(5d) is affected.
- Version 4.3(6a) is affected.
- Version 4.3(6b) is affected.
- Version 4.3(5e) is affected.
- Version 4.3(6c) is affected.
- Version 4.2(3p) is affected.
- Version 4.3(6d) is affected.
- Version 4.3(6e) is affected.
- Version 4.3(6f) is affected.
- Version 4.2(3r) is affected.
- Version 4.3(6g) is affected.
- Version 4.3(6h) is affected.
- Version 4.2(3s) is affected.
- Version 4.3(6i) is affected.