CVE-2026-76455

Vulnérabilité critique dans Cisco NX-OS Software (Cisco)

CVSS 9.8 · Critique

EPSS 0.3%

Cisco•Cisco NX-OS Software•Versions : 4.2(1c), 4.2(2e), 15.2(8e), 8.2(4), 4.1(3h), 16.0(4c), 8.4(11), 15.2(7g), 9.4(4), 10.6(3o), 15.2(4d), 4.2(2c), 4.1(3n), 16.0(9d), 9.2(4), 8.2(7), 4.2(1k), 9.3(5), 8.4(2a), 9.2(2t), 4.0(2b), 10.5(2), 4.2(3o), 8.4(2), 8.4(5), 4.0(4m), 4.3(6b), 9.3(5w), 4.3(6h), 4.0(1a), 8.4(12), 4.1(1d), 4.2(3j), 4.2(3l), 15.2(2h), 16.0(8h), 9.4(3b), 16.0(6c), 4.1(4a), 4.2(3e), 4.0(4d), 9.3(7a), 6.0(2c), 16.0(9f), 10.3(4g), 16.0(6h), 7.3(8)D1(1), 10.3(2), 8.4(2e), 4.3(2c), 15.2(5e), 9.3(1z), 8.4(4), 16.0(7e), 7.3(6)D1(1), 6.0(1h), 10.4(5), 8.4(10), 16.0(1g), 4.2(2d), 10.3(3x), 9.3(13), 9.2(3), 4.1(2a), 7.3(4)D1(1), 8.2(1), 4.3(3c), 8.4(2b), 10.3(99w), 4.1(3f), 16.1(5e), 10.5(3s), 10.4(2), 9.3(16), 4.2(1l), 4.3(2b), 4.3(6c), 4.3(4f), 4.0(2a), 9.3(9), 9.4(2), 7.3(2)D1(3), 4.1(3c), 16.0(3e), 6.0(2d), 7.3(2)D1(1), 9.3(10), 16.0(9e), 10.3(99x), 6.0(1e), 16.1(4h), 15.3(2e), 10.4(7), 4.1(3a), 9.2(1), 10.5(3p), 15.2(8f), 4.3(3a), 4.1(2b), 4.3(4a), 4.0(4h), 4.1(1e), 4.1(3l), 16.1(2g), 4.2(3b), 4.0(4i), 8.2(6), 8.1(2a), 8.4(1), 15.2(6h), 10.3(1), 4.0(2d), 4.1(3e), 4.3(2f), 4.3(4e), 9.3(15), 16.0(2h), 16.0(3g), 7.3(3)D1(1), 10.3(3w), 15.3(2d), 7.3(2)D1(2), 7.3(0)D1(1), 4.2(1m), 4.0(1b), 15.3(2c), 10.6(2s), 4.3(6g), 10.3(4h), 9.2(1a), 7.3(2)D1(3a), 15.3(2a), 15.2(4e), 4.2(2a), 8.5(1), 6.0(1b), 7.3(0)DX(1), 9.3(2a), 4.3(6d), 15.2(8d), 8.3(2), 10.5(3e), 10.5(5), 9.3(12), 15.3(1d), 10.5(1j), 8.2(5), 15.2(2f), 7.3(9)D1(1), 4.3(4c), 9.4(1), 4.2(3k), 9.3(1), 8.1(1a), 8.4(9), 4.3(5d), 8.2(11), 4.2(3h), 8.2(7a), 10.3(4a), 16.0(3d), 15.2(3e), 10.3(7), 4.3(5c), 10.4(4g), 15.2(4f), 10.3(5), 4.3(5e), 9.3(4), 16.1(2f), 7.3(1)DY(1), 8.4(2f), 4.2(3r), 10.6(3q), 4.0(1d), 10.4(3), 9.3(14), 10.6(3), 4.1(3j), 8.2(8), 4.2(3p), 4.2(3s), 10.6(3s), 4.1(1a), 9.3(17), 9.4(3), 15.2(2g), 4.1(3m), 6.0(1f), 8.4(6), 10.5(3), 8.2(2), 16.0(5h), 10.6(1s), 8.4(2d), 9.2(3y), 4.0(4n), 7.3(2)D1(1d), 9.4(1a), 15.2(6g), 10.6(2), 15.2(5c), 4.3(6i), 16.1(3g), 4.1(3b), 16.0(9c), 8.4(6a), 4.1(1c), 4.2(3g), 6.0(2b), 9.2(2), 10.4(1), 4.2(3m), 10.3(9), 4.3(2e), 8.4(1a), 8.4(4a), 4.0(4e), 9.4(3a), 9.3(3), 4.0(1c), 8.4(13), 4.1(3d), 10.3(3), 4.1(3i), 4.0(2e), 15.2(2e), 15.2(1g), 9.3(8), 8.1(1b), 15.2(6e), 4.2(1i), 10.5(1), 10.5(4), 16.2(2e), 4.0(4o), 10.6(1), 10.3(3q), 8.1(1), 7.3(7)D1(1), 16.0(8e), 4.3(4b), 4.2(3d), 4.3(6e), 10.5(3t), 4.0(4k), 4.1(1b), 9.4(2a), 10.3(3r), 8.3(1), 6.0(1c), 8.2(3), 16.0(5j), 9.3(2), 8.2(9), 9.3(6), 4.2(3i), 4.3(4d), 4.2(1f), 9.3(11), 10.3(4), 15.2(8g), 7.3(5)D1(1), 16.2(1g), 15.2(7f), 4.3(5a), 8.2(10), 4.2(3n), 15.2(8h), 9.2(2v), 6.0(1d), 4.0(4c), 10.3(8), 10.4(6), 9.4(5), 15.2(3f), 10.6(2n), 8.4(2c), 15.2(5d), 10.3(3o), 4.3(6f), 15.3(2b), 4.0(4l), 9.3(7), 10.3(3p), 8.4(3), 4.2(1n), 10.5(3o), 4.1(2c), 4.0(4f), 4.0(4a), 16.1(1f), 4.1(3k), 15.3(2f), 8.4(8), 10.4(4), 8.1(2), 16.0(1j), 9.3(7k), 8.4(7), 16.0(2j), 4.2(1d), 4.0(4g), 15.2(3g), 7.3(0)DY(1), 15.2(8i), 10.3(6), 7.3(1)D1(1), 16.1(3f), 16.0(8f), 4.0(4b), 4.3(6a)

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

Gravité et risque d'exploitation

CVE-2026-76455 obtient un score CVSS de 9.8/10, soit une gravité critique. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.28 %, ce qui la place devant 19.7 % des CVE référencées.

Que faire ?

Vérifiez si Cisco NX-OS Software (versions 4.2(1c), 4.2(2e), 15.2(8e), 8.2(4), 4.1(3h), 16.0(4c), 8.4(11), 15.2(7g), 9.4(4), 10.6(3o), 15.2(4d), 4.2(2c), 4.1(3n), 16.0(9d), 9.2(4), 8.2(7), 4.2(1k), 9.3(5), 8.4(2a), 9.2(2t), 4.0(2b), 10.5(2), 4.2(3o), 8.4(2), 8.4(5), 4.0(4m), 4.3(6b), 9.3(5w), 4.3(6h), 4.0(1a), 8.4(12), 4.1(1d), 4.2(3j), 4.2(3l), 15.2(2h), 16.0(8h), 9.4(3b), 16.0(6c), 4.1(4a), 4.2(3e), 4.0(4d), 9.3(7a), 6.0(2c), 16.0(9f), 10.3(4g), 16.0(6h), 7.3(8)D1(1), 10.3(2), 8.4(2e), 4.3(2c), 15.2(5e), 9.3(1z), 8.4(4), 16.0(7e), 7.3(6)D1(1), 6.0(1h), 10.4(5), 8.4(10), 16.0(1g), 4.2(2d), 10.3(3x), 9.3(13), 9.2(3), 4.1(2a), 7.3(4)D1(1), 8.2(1), 4.3(3c), 8.4(2b), 10.3(99w), 4.1(3f), 16.1(5e), 10.5(3s), 10.4(2), 9.3(16), 4.2(1l), 4.3(2b), 4.3(6c), 4.3(4f), 4.0(2a), 9.3(9), 9.4(2), 7.3(2)D1(3), 4.1(3c), 16.0(3e), 6.0(2d), 7.3(2)D1(1), 9.3(10), 16.0(9e), 10.3(99x), 6.0(1e), 16.1(4h), 15.3(2e), 10.4(7), 4.1(3a), 9.2(1), 10.5(3p), 15.2(8f), 4.3(3a), 4.1(2b), 4.3(4a), 4.0(4h), 4.1(1e), 4.1(3l), 16.1(2g), 4.2(3b), 4.0(4i), 8.2(6), 8.1(2a), 8.4(1), 15.2(6h), 10.3(1), 4.0(2d), 4.1(3e), 4.3(2f), 4.3(4e), 9.3(15), 16.0(2h), 16.0(3g), 7.3(3)D1(1), 10.3(3w), 15.3(2d), 7.3(2)D1(2), 7.3(0)D1(1), 4.2(1m), 4.0(1b), 15.3(2c), 10.6(2s), 4.3(6g), 10.3(4h), 9.2(1a), 7.3(2)D1(3a), 15.3(2a), 15.2(4e), 4.2(2a), 8.5(1), 6.0(1b), 7.3(0)DX(1), 9.3(2a), 4.3(6d), 15.2(8d), 8.3(2), 10.5(3e), 10.5(5), 9.3(12), 15.3(1d), 10.5(1j), 8.2(5), 15.2(2f), 7.3(9)D1(1), 4.3(4c), 9.4(1), 4.2(3k), 9.3(1), 8.1(1a), 8.4(9), 4.3(5d), 8.2(11), 4.2(3h), 8.2(7a), 10.3(4a), 16.0(3d), 15.2(3e), 10.3(7), 4.3(5c), 10.4(4g), 15.2(4f), 10.3(5), 4.3(5e), 9.3(4), 16.1(2f), 7.3(1)DY(1), 8.4(2f), 4.2(3r), 10.6(3q), 4.0(1d), 10.4(3), 9.3(14), 10.6(3), 4.1(3j), 8.2(8), 4.2(3p), 4.2(3s), 10.6(3s), 4.1(1a), 9.3(17), 9.4(3), 15.2(2g), 4.1(3m), 6.0(1f), 8.4(6), 10.5(3), 8.2(2), 16.0(5h), 10.6(1s), 8.4(2d), 9.2(3y), 4.0(4n), 7.3(2)D1(1d), 9.4(1a), 15.2(6g), 10.6(2), 15.2(5c), 4.3(6i), 16.1(3g), 4.1(3b), 16.0(9c), 8.4(6a), 4.1(1c), 4.2(3g), 6.0(2b), 9.2(2), 10.4(1), 4.2(3m), 10.3(9), 4.3(2e), 8.4(1a), 8.4(4a), 4.0(4e), 9.4(3a), 9.3(3), 4.0(1c), 8.4(13), 4.1(3d), 10.3(3), 4.1(3i), 4.0(2e), 15.2(2e), 15.2(1g), 9.3(8), 8.1(1b), 15.2(6e), 4.2(1i), 10.5(1), 10.5(4), 16.2(2e), 4.0(4o), 10.6(1), 10.3(3q), 8.1(1), 7.3(7)D1(1), 16.0(8e), 4.3(4b), 4.2(3d), 4.3(6e), 10.5(3t), 4.0(4k), 4.1(1b), 9.4(2a), 10.3(3r), 8.3(1), 6.0(1c), 8.2(3), 16.0(5j), 9.3(2), 8.2(9), 9.3(6), 4.2(3i), 4.3(4d), 4.2(1f), 9.3(11), 10.3(4), 15.2(8g), 7.3(5)D1(1), 16.2(1g), 15.2(7f), 4.3(5a), 8.2(10), 4.2(3n), 15.2(8h), 9.2(2v), 6.0(1d), 4.0(4c), 10.3(8), 10.4(6), 9.4(5), 15.2(3f), 10.6(2n), 8.4(2c), 15.2(5d), 10.3(3o), 4.3(6f), 15.3(2b), 4.0(4l), 9.3(7), 10.3(3p), 8.4(3), 4.2(1n), 10.5(3o), 4.1(2c), 4.0(4f), 4.0(4a), 16.1(1f), 4.1(3k), 15.3(2f), 8.4(8), 10.4(4), 8.1(2), 16.0(1j), 9.3(7k), 8.4(7), 16.0(2j), 4.2(1d), 4.0(4g), 15.2(3g), 7.3(0)DY(1), 15.2(8i), 10.3(6), 7.3(1)D1(1), 16.1(3f), 16.0(8f), 4.0(4b), 4.3(6a)) est présent sur votre parc.
Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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