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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Cisco | Cisco NX-OS Software | 8.2(5), 7.3(5)D1(1), 8.4(2), 8.4(3), 9.2(3), 8.2(1), 7.3(1)D1(1), 9.2(2v), 7.3(0)D1(1), 7.3(4)D1(1), 9.2(1), 9.2(2t), 9.2(3y), 9.3(2), 7.3(1)DY(1), 8.1(1), 8.2(2), 8.3(2), 7.3(2)D1(3a), 9.2(4), 8.1(2), 7.3(3)D1(1), 8.2(3), 8.3(1), 8.4(1), 8.1(1b), 7.3(0)DX(1), 7.3(2)D1(1), 9.3(1), 7.3(2)D1(2), 8.2(… | — |
| Cisco | Cisco NX-OS System Software in ACI Mode | 15.2(1g), 15.2(2e), 15.2(2f), 15.2(2g), 15.2(2h), 15.2(3f), 15.2(3e), 15.2(3g), 15.2(4d), 15.2(4e), 15.2(5c), 15.2(5d), 16.0(1g), 15.2(5e), 15.2(4f), 15.2(6e), 15.2(6h), 16.0(1j), 15.2(6g), 15.2(7f), 15.2(7g), 16.0(2h), 15.2(8d), 16.0(2j), 15.2(8e), 16.0(3d), 16.0(3e), 15.2(8f), 15.2(8g), 15.3(1d),… | — |
| Cisco | Cisco Unified Computing System (Managed) | 4.0(1a), 4.1(1a), 4.1(1b), 4.0(4h), 4.1(1c), 4.0(4e), 4.0(4g), 4.0(2e), 4.0(4a), 4.0(2d), 4.0(1b), 4.0(4f), 4.0(4c), 4.0(1c), 4.0(4b), 4.0(2b), 4.0(4d), 4.0(2a), 4.0(1d), 4.0(4i), 4.1(1d), 4.1(2a), 4.1(1e), 4.1(2b), 4.0(4k), 4.1(3a), 4.1(3b), 4.1(2c), 4.0(4l), 4.1(4a), 4.1(3c), 4.1(3d), 4.2(1c), 4.… | — |
Advisories 2
- NCSC-2026-0406 Kwetsbaarheden verholpen in Cisco NX-OS Software NCSC-NL (Netherlands) · Oct 8, 2026
- WID-SEC-2026-3810 Cisco Nexus und Cisco NX-OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 7, 2026