CVE-2026-76456
Received Received - Intake

Improper Input Validation in Cisco NX-OS

Vulnerability report for CVE-2026-76456, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-07

Last updated on: 2026-10-07

Assigner: Cisco Systems, Inc.

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76456 are related to improper input validation of special elements used in a command issue that are grouped under the Common Weakness Enumeration (CWE) CWE-20.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-07
Last Modified
2026-10-07
Generated
2026-10-07
AI Q&A
2026-10-07
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 313 associated CPEs
Vendor Product Version / Range
Cisco Cisco NX-OS Software 8.2(5)
Cisco Cisco NX-OS Software 7.3(5)D1(1)
Cisco Cisco NX-OS Software 8.4(2)
Cisco Cisco NX-OS Software 8.4(3)
Cisco Cisco NX-OS Software 9.2(3)
Cisco Cisco NX-OS Software 8.2(1)
Cisco Cisco NX-OS Software 7.3(1)D1(1)
Cisco Cisco NX-OS Software 9.2(2v)
Cisco Cisco NX-OS Software 7.3(0)D1(1)
Cisco Cisco NX-OS Software 7.3(4)D1(1)
Cisco Cisco NX-OS Software 9.2(1)
Cisco Cisco NX-OS Software 9.2(2t)
Cisco Cisco NX-OS Software 9.2(3y)
Cisco Cisco NX-OS Software 9.3(2)
Cisco Cisco NX-OS Software 7.3(1)DY(1)
Cisco Cisco NX-OS Software 8.1(1)
Cisco Cisco NX-OS Software 8.2(2)
Cisco Cisco NX-OS Software 8.3(2)
Cisco Cisco NX-OS Software 7.3(2)D1(3a)
Cisco Cisco NX-OS Software 9.2(4)
Cisco Cisco NX-OS Software 8.1(2)
Cisco Cisco NX-OS Software 7.3(3)D1(1)
Cisco Cisco NX-OS Software 8.2(3)
Cisco Cisco NX-OS Software 8.3(1)
Cisco Cisco NX-OS Software 8.4(1)
Cisco Cisco NX-OS Software 8.1(1b)
Cisco Cisco NX-OS Software 7.3(0)DX(1)
Cisco Cisco NX-OS Software 7.3(2)D1(1)
Cisco Cisco NX-OS Software 9.3(1)
Cisco Cisco NX-OS Software 7.3(2)D1(2)
Cisco Cisco NX-OS Software 8.2(4)
Cisco Cisco NX-OS Software 7.3(0)DY(1)
Cisco Cisco NX-OS Software 9.3(1z)
Cisco Cisco NX-OS Software 9.2(2)
Cisco Cisco NX-OS Software 8.1(2a)
Cisco Cisco NX-OS Software 7.3(2)D1(3)
Cisco Cisco NX-OS Software 8.1(1a)
Cisco Cisco NX-OS Software 8.4(1a)
Cisco Cisco NX-OS Software 9.3(3)
Cisco Cisco NX-OS Software 7.3(2)D1(1d)
Cisco Cisco NX-OS Software 9.3(4)
Cisco Cisco NX-OS Software 7.3(6)D1(1)
Cisco Cisco NX-OS Software 8.2(6)
Cisco Cisco NX-OS Software 9.3(5)
Cisco Cisco NX-OS Software 8.4(2a)
Cisco Cisco NX-OS Software 8.4(2b)
Cisco Cisco NX-OS Software 8.5(1)
Cisco Cisco NX-OS Software 9.3(6)
Cisco Cisco NX-OS Software 8.4(4)
Cisco Cisco NX-OS Software 7.3(7)D1(1)
Cisco Cisco NX-OS Software 8.4(2c)
Cisco Cisco NX-OS Software 9.3(5w)
Cisco Cisco NX-OS Software 8.2(7)
Cisco Cisco NX-OS Software 9.3(7)
Cisco Cisco NX-OS Software 9.3(7k)
Cisco Cisco NX-OS Software 7.3(8)D1(1)
Cisco Cisco NX-OS Software 9.3(7a)
Cisco Cisco NX-OS Software 8.2(7a)
Cisco Cisco NX-OS Software 9.3(8)
Cisco Cisco NX-OS Software 8.4(4a)
Cisco Cisco NX-OS Software 8.4(2d)
Cisco Cisco NX-OS Software 8.4(5)
Cisco Cisco NX-OS Software 8.2(8)
Cisco Cisco NX-OS Software 9.3(9)
Cisco Cisco NX-OS Software 7.3(9)D1(1)
Cisco Cisco NX-OS Software 8.4(6)
Cisco Cisco NX-OS Software 8.4(2e)
Cisco Cisco NX-OS Software 9.3(10)
Cisco Cisco NX-OS Software 9.2(1a)
Cisco Cisco NX-OS Software 8.2(9)
Cisco Cisco NX-OS Software 10.3(1)
Cisco Cisco NX-OS Software 8.4(7)
Cisco Cisco NX-OS Software 10.3(2)
Cisco Cisco NX-OS Software 8.4(6a)
Cisco Cisco NX-OS Software 9.3(11)
Cisco Cisco NX-OS Software 10.3(3)
Cisco Cisco NX-OS Software 9.4(1)
Cisco Cisco NX-OS Software 9.3(2a)
Cisco Cisco NX-OS Software 8.4(2f)
Cisco Cisco NX-OS Software 8.2(10)
Cisco Cisco NX-OS Software 9.3(12)
Cisco Cisco NX-OS Software 10.4(1)
Cisco Cisco NX-OS Software 8.4(8)
Cisco Cisco NX-OS Software 10.3(99w)
Cisco Cisco NX-OS Software 10.3(3w)
Cisco Cisco NX-OS Software 10.3(99x)
Cisco Cisco NX-OS Software 10.3(3o)
Cisco Cisco NX-OS Software 8.4(9)
Cisco Cisco NX-OS Software 10.3(4)
Cisco Cisco NX-OS Software 10.3(3p)
Cisco Cisco NX-OS Software 10.3(4a)
Cisco Cisco NX-OS Software 9.4(1a)
Cisco Cisco NX-OS Software 10.4(2)
Cisco Cisco NX-OS Software 10.3(3q)
Cisco Cisco NX-OS Software 9.3(13)
Cisco Cisco NX-OS Software 8.2(11)
Cisco Cisco NX-OS Software 9.4(2)
Cisco Cisco NX-OS Software 10.3(5)
Cisco Cisco NX-OS Software 10.4(3)
Cisco Cisco NX-OS Software 10.3(3x)
Cisco Cisco NX-OS Software 10.3(4g)
Cisco Cisco NX-OS Software 10.5(1)
Cisco Cisco NX-OS Software 8.4(10)
Cisco Cisco NX-OS Software 9.4(2a)
Cisco Cisco NX-OS Software 10.3(3r)
Cisco Cisco NX-OS Software 10.3(6)
Cisco Cisco NX-OS Software 9.3(14)
Cisco Cisco NX-OS Software 10.4(4)
Cisco Cisco NX-OS Software 10.3(4h)
Cisco Cisco NX-OS Software 10.5(2)
Cisco Cisco NX-OS Software 10.5(1j)
Cisco Cisco NX-OS Software 8.4(11)
Cisco Cisco NX-OS Software 9.4(3)
Cisco Cisco NX-OS Software 10.3(7)
Cisco Cisco NX-OS Software 10.4(5)
Cisco Cisco NX-OS Software 10.5(3)
Cisco Cisco NX-OS Software 9.3(15)
Cisco Cisco NX-OS Software 9.4(3a)
Cisco Cisco NX-OS Software 10.4(4g)
Cisco Cisco NX-OS Software 10.5(4)
Cisco Cisco NX-OS Software 9.4(3b)
Cisco Cisco NX-OS Software 8.4(12)
Cisco Cisco NX-OS Software 10.6(1)
Cisco Cisco NX-OS Software 10.5(3t)
Cisco Cisco NX-OS Software 10.3(8)
Cisco Cisco NX-OS Software 10.4(6)
Cisco Cisco NX-OS Software 10.5(3s)
Cisco Cisco NX-OS Software 10.5(3e)
Cisco Cisco NX-OS Software 9.4(4)
Cisco Cisco NX-OS Software 10.5(3o)
Cisco Cisco NX-OS Software 9.3(16)
Cisco Cisco NX-OS Software 10.6(1s)
Cisco Cisco NX-OS Software 10.6(2)
Cisco Cisco NX-OS Software 10.5(3p)
Cisco Cisco NX-OS Software 9.4(5)
Cisco Cisco NX-OS Software 10.3(9)
Cisco Cisco NX-OS Software 10.6(2s)
Cisco Cisco NX-OS Software 8.4(13)
Cisco Cisco NX-OS Software 10.6(3)
Cisco Cisco NX-OS Software 10.4(7)
Cisco Cisco NX-OS Software 10.5(5)
Cisco Cisco NX-OS Software 9.3(17)
Cisco Cisco NX-OS Software 10.6(2n)
Cisco Cisco NX-OS Software 10.6(3q)
Cisco Cisco NX-OS Software 10.6(3o)
Cisco Cisco NX-OS Software 10.6(3s)
Cisco Cisco NX-OS Software 7.3(18)N1(1)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(1g)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(2e)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(2f)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(2g)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(2h)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(3f)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(3e)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(3g)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(4d)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(4e)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(5c)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(5d)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(1g)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(5e)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(4f)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(6e)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(6h)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(1j)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(6g)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(7f)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(7g)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(2h)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(8d)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(2j)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(8e)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(3d)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(3e)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(8f)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(8g)
Cisco Cisco NX-OS System Software in ACI Mode 15.3(1d)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(8h)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(4c)
Cisco Cisco NX-OS System Software in ACI Mode 15.3(2a)
Cisco Cisco NX-OS System Software in ACI Mode 15.2(8i)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(5h)
Cisco Cisco NX-OS System Software in ACI Mode 15.3(2b)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(3g)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(5j)
Cisco Cisco NX-OS System Software in ACI Mode 15.3(2c)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(6c)
Cisco Cisco NX-OS System Software in ACI Mode 15.3(2d)
Cisco Cisco NX-OS System Software in ACI Mode 16.1(1f)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(7e)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(8e)
Cisco Cisco NX-OS System Software in ACI Mode 15.3(2e)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(8f)
Cisco Cisco NX-OS System Software in ACI Mode 16.1(2f)
Cisco Cisco NX-OS System Software in ACI Mode 16.1(2g)
Cisco Cisco NX-OS System Software in ACI Mode 15.3(2f)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(9c)
Cisco Cisco NX-OS System Software in ACI Mode 16.1(3f)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(9d)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(6h)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(8h)
Cisco Cisco NX-OS System Software in ACI Mode 16.1(3g)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(9e)
Cisco Cisco NX-OS System Software in ACI Mode 16.1(4h)
Cisco Cisco NX-OS System Software in ACI Mode 16.1(5e)
Cisco Cisco NX-OS System Software in ACI Mode 16.2(1g)
Cisco Cisco NX-OS System Software in ACI Mode 16.0(9f)
Cisco Cisco NX-OS System Software in ACI Mode 16.2(2e)
Cisco Cisco Unified Computing System (Managed) 4.0(1a)
Cisco Cisco Unified Computing System (Managed) 4.1(1a)
Cisco Cisco Unified Computing System (Managed) 4.1(1b)
Cisco Cisco Unified Computing System (Managed) 4.0(4h)
Cisco Cisco Unified Computing System (Managed) 4.1(1c)
Cisco Cisco Unified Computing System (Managed) 4.0(4e)
Cisco Cisco Unified Computing System (Managed) 4.0(4g)
Cisco Cisco Unified Computing System (Managed) 4.0(2e)
Cisco Cisco Unified Computing System (Managed) 4.0(4a)
Cisco Cisco Unified Computing System (Managed) 4.0(2d)
Cisco Cisco Unified Computing System (Managed) 4.0(1b)
Cisco Cisco Unified Computing System (Managed) 4.0(4f)
Cisco Cisco Unified Computing System (Managed) 4.0(4c)
Cisco Cisco Unified Computing System (Managed) 4.0(1c)
Cisco Cisco Unified Computing System (Managed) 4.0(4b)
Cisco Cisco Unified Computing System (Managed) 4.0(2b)
Cisco Cisco Unified Computing System (Managed) 4.0(4d)
Cisco Cisco Unified Computing System (Managed) 4.0(2a)
Cisco Cisco Unified Computing System (Managed) 4.0(1d)
Cisco Cisco Unified Computing System (Managed) 4.0(4i)
Cisco Cisco Unified Computing System (Managed) 4.1(1d)
Cisco Cisco Unified Computing System (Managed) 4.1(2a)
Cisco Cisco Unified Computing System (Managed) 4.1(1e)
Cisco Cisco Unified Computing System (Managed) 4.1(2b)
Cisco Cisco Unified Computing System (Managed) 4.0(4k)
Cisco Cisco Unified Computing System (Managed) 4.1(3a)
Cisco Cisco Unified Computing System (Managed) 4.1(3b)
Cisco Cisco Unified Computing System (Managed) 4.1(2c)
Cisco Cisco Unified Computing System (Managed) 4.0(4l)
Cisco Cisco Unified Computing System (Managed) 4.1(4a)
Cisco Cisco Unified Computing System (Managed) 4.1(3c)
Cisco Cisco Unified Computing System (Managed) 4.1(3d)
Cisco Cisco Unified Computing System (Managed) 4.2(1c)
Cisco Cisco Unified Computing System (Managed) 4.2(1d)
Cisco Cisco Unified Computing System (Managed) 4.0(4m)
Cisco Cisco Unified Computing System (Managed) 4.1(3e)
Cisco Cisco Unified Computing System (Managed) 4.2(1f)
Cisco Cisco Unified Computing System (Managed) 4.1(3f)
Cisco Cisco Unified Computing System (Managed) 4.2(1i)
Cisco Cisco Unified Computing System (Managed) 4.1(3h)
Cisco Cisco Unified Computing System (Managed) 4.2(1k)
Cisco Cisco Unified Computing System (Managed) 4.2(1l)
Cisco Cisco Unified Computing System (Managed) 4.0(4n)
Cisco Cisco Unified Computing System (Managed) 4.2(1m)
Cisco Cisco Unified Computing System (Managed) 4.1(3i)
Cisco Cisco Unified Computing System (Managed) 4.2(2a)
Cisco Cisco Unified Computing System (Managed) 4.2(1n)
Cisco Cisco Unified Computing System (Managed) 4.1(3j)
Cisco Cisco Unified Computing System (Managed) 4.2(2c)
Cisco Cisco Unified Computing System (Managed) 4.2(2d)
Cisco Cisco Unified Computing System (Managed) 4.2(3b)
Cisco Cisco Unified Computing System (Managed) 4.1(3k)
Cisco Cisco Unified Computing System (Managed) 4.0(4o)
Cisco Cisco Unified Computing System (Managed) 4.2(2e)
Cisco Cisco Unified Computing System (Managed) 4.2(3d)
Cisco Cisco Unified Computing System (Managed) 4.2(3e)
Cisco Cisco Unified Computing System (Managed) 4.2(3g)
Cisco Cisco Unified Computing System (Managed) 4.1(3l)
Cisco Cisco Unified Computing System (Managed) 4.3(2b)
Cisco Cisco Unified Computing System (Managed) 4.2(3h)
Cisco Cisco Unified Computing System (Managed) 4.2(3i)
Cisco Cisco Unified Computing System (Managed) 4.3(2c)
Cisco Cisco Unified Computing System (Managed) 4.1(3m)
Cisco Cisco Unified Computing System (Managed) 4.3(2e)
Cisco Cisco Unified Computing System (Managed) 4.3(3a)
Cisco Cisco Unified Computing System (Managed) 4.2(3j)
Cisco Cisco Unified Computing System (Managed) 4.3(3c)
Cisco Cisco Unified Computing System (Managed) 4.3(4a)
Cisco Cisco Unified Computing System (Managed) 4.2(3k)
Cisco Cisco Unified Computing System (Managed) 4.3(4b)
Cisco Cisco Unified Computing System (Managed) 4.3(4c)
Cisco Cisco Unified Computing System (Managed) 4.2(3l)
Cisco Cisco Unified Computing System (Managed) 4.3(4d)
Cisco Cisco Unified Computing System (Managed) 4.3(2f)
Cisco Cisco Unified Computing System (Managed) 4.2(3m)
Cisco Cisco Unified Computing System (Managed) 4.3(5a)
Cisco Cisco Unified Computing System (Managed) 4.3(4e)
Cisco Cisco Unified Computing System (Managed) 4.1(3n)
Cisco Cisco Unified Computing System (Managed) 4.3(4f)
Cisco Cisco Unified Computing System (Managed) 4.2(3n)
Cisco Cisco Unified Computing System (Managed) 4.3(5c)
Cisco Cisco Unified Computing System (Managed) 4.2(3o)
Cisco Cisco Unified Computing System (Managed) 4.3(5d)
Cisco Cisco Unified Computing System (Managed) 4.3(6a)
Cisco Cisco Unified Computing System (Managed) 4.3(6b)
Cisco Cisco Unified Computing System (Managed) 4.3(5e)
Cisco Cisco Unified Computing System (Managed) 4.3(6c)
Cisco Cisco Unified Computing System (Managed) 6.0(1b)
Cisco Cisco Unified Computing System (Managed) 4.2(3p)
Cisco Cisco Unified Computing System (Managed) 6.0(1c)
Cisco Cisco Unified Computing System (Managed) 4.3(6d)
Cisco Cisco Unified Computing System (Managed) 6.0(1d)
Cisco Cisco Unified Computing System (Managed) 6.0(1e)
Cisco Cisco Unified Computing System (Managed) 4.3(6e)
Cisco Cisco Unified Computing System (Managed) 6.0(1f)
Cisco Cisco Unified Computing System (Managed) 4.3(6f)
Cisco Cisco Unified Computing System (Managed) 6.0(2b)
Cisco Cisco Unified Computing System (Managed) 6.0(1h)
Cisco Cisco Unified Computing System (Managed) 4.2(3r)
Cisco Cisco Unified Computing System (Managed) 6.0(2c)
Cisco Cisco Unified Computing System (Managed) 4.3(6g)
Cisco Cisco Unified Computing System (Managed) 6.0(2d)
Cisco Cisco Unified Computing System (Managed) 4.3(6h)
Cisco Cisco Unified Computing System (Managed) 4.2(3s)
Cisco Cisco Unified Computing System (Managed) 4.3(6i)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

CVE-2026-76456 is a vulnerability in Cisco NX-OS software caused by improper input validation of special elements used in command execution. It falls under CWE-20, which involves weaknesses related to improper input validation.

Detection Guidance

The provided CVE data does not include specific detection methods or commands for identifying CVE-2026-76456 on a network or system. I don't know

Impact Analysis

This vulnerability could allow attackers to execute unauthorized commands or manipulate system behavior by injecting specially crafted input. It may lead to unauthorized access, data breaches, or system disruption in affected Cisco NX-OS systems.

Mitigation Strategies

Immediate mitigation steps are not detailed in the provided CVE data. Cisco recommends applying the software hardening release addressing this vulnerability as part of their proactive security measures.

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EPSS Chart