CVE-2026-76455 — Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Access Control Vulnerabilities

Description (CNA)

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-2026-76455 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-284.

Affected (CNA)

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

CWE

CWE-284

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-nxosw1-cWzSbtR

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.