CVE-2026-20293

Vulnérabilité élevée dans Cisco Enterprise NFV Infrastructure Software (Cisco)

CVSS 7.1 · Élevée

EPSS 0.2%

Cisco•Cisco Enterprise NFV Infrastructure Software•Versions : 4.12.4, 4.1(3c), 3.5.2, 4.2(1c), 3.8.1, 3.4.1, 4.1(1h), 4.12.2, 4.2.2, 4.14.1, 4.2(2e), 6.0(1.251030), 4.15.2, 4.3(5d), 3.1(3d), 6.0(1.250174), 4.15.1, 4.1(3h), 4.3(3.240043), 4.3(4.242066), 4.2(1i), 4.3(2.240037), 1.0(1.250032), 4.3(1.230097), 3.1(2e), 3.1(3b), 4.2(2c), 4.1(3n), 4.3(1.230124), 4.0(1.240), 4.3(2.240090), 6.0(1.250127), 4.3(2.260007), 4.0(2q), 6.0(2.260034), 4.0(4o), 4.15.5, 4.3(3.240041), 4.0(2o), 4.15.6, 3.9.2, 3.1(3h), 3.6.2, 4.2(3h), 3.9.1, 4.3(1.230138), 4.3(4.241014), 4.0(1e), 4.9.3, 4.3(4b), 4.1(1f), 4.3(4.242028), 6.0(1e), 4.0(4j), 1.2(0.260005), 3.1(3j), 4.2(3d), 4.3(6e), 4.13.1, 4.3(2.250016), 4.3(2.250045), 2.0(2.260101), 4.2(1k), 4.8.2, 4.6.3, 3.10.1, 4.0(4k), 4.3(5c), 4.9.2, 4.1(1b), 4.1(3a), 1.0(1.250002), 4.0(2b), 4.4.3, 4.3(5e), 1.1(0.250022), 4.2(3o), 1.1(0.250026), 4.2(3r), 4.1(2l), 1.1(0.250025), 3.12.2, 4.0(4m), 4.3(6b), 4.0(1d), 6.0(1c), 1.0(0.250003), 4.0(2p), 4.3(5.250001), 4.3(2.250022), 4.0(2h), 4.9.1, 3.1(3g), 4.3(3a), 4.0(1a), 4.4.2, 4.12.8, 4.1(2b), 4.0(2g), 3.12.1b, 4.1(3j), 4.1(1d), 4.3(4a), 4.2(3j), 4.2(3l), 6.0(1.251006), 4.1(2e), 4.1(2k), 4.2(3i), 4.0(4h), 4.1(1e), 4.1(3l), 4.9.10, 4.1(4a), 4.0(2n), 4.2(3p), 4.0(2r), 4.2.1, 4.2(3e), 4.3(6.250040), 4.3(5.250033), 4.3(4d), 4.1(1a), 4.3(6.250044), 4.12.5, 4.1.2, 4.0(4d), 4.2(1f), 4.2(3b), 4.1(3m), 6.0(1f), 3.1(1d), 6.0(2c), 4.0(4i), 4.1(1g), 4.3(2.250037), 4.3(6.260003), 3.6.3, 4.9.5, 4.0(2f), 4.3(5a), 4.0(1.260003), 4.2(1j), 4.3(2c), 4.15.3, 4.9.6, 4.0(2d), 4.3(4.252001), 4.2(3n), 6.0(1.250131), 4.3(6.250117), 4.3(5.250045), 3.7.1, 4.1(3e), 4.1(2h), 4.2(1g), 4.3(6.260033), 6.0(1d), 4.6.3-FC4, 4.3(2f), 6.0(1.250130), 4.0(4c), 2.0(1.250096), 4.12.1, 6.0(2.260044), 4.4.1, 4.3(4e), 3.1(2i), 3.10.2, 2.0(1.250127), 4.0(4n), 4.3(5.250030), 4.3(2.240107), 6.0(1h), 4.6.4, 4.1(2g), 4.1(2j), 4.6.2, 4.3(6f), 4.0(4l), 3.1(2b), 4.2(2d), 4.2(1n), 4.3(4.242038), 4.1(2c), 3.12.1a, 4.2(1m), 4.2(2f), 1.2(0.250011), 4.0(4f), 4.1(3b), 4.1(2d), 4.1(3g), 4.0(1b), 4.1(1c), 3.12.3, 4.2(1e), 4.2(3q), 4.3(5.250043), 4.5.1, 4.3(6g), 4.3(2.230270), 4.0(4a), 3.1(2c), 4.2(1b), 4.2(2g), 4.2(1a), 3.10.3, 4.15.4, 4.3(2.240077), 4.3(5.240021), 4.3(6.250060), 4.10.1, 2.0(2.260062), 4.1.1, 3.11.2, 4.2(3g), 4.1(2a), 4.1(3k), 4.6.1, 6.0(2.260042), 3.1(2g), 4.3(4.241063), 6.0(2b), 4.3(2.250021), 4.3(2.250063), 1.0(0.240001), 4.2(2a), 4.3(2.240002), 4.3(2.240009), 3.1(2d), 4.3(3c), 1.2(0.250013), 4.3(6.250101), 4.7.1, 4.2(3m), 4.3(6.250039), 4.0(2c), 6.0(1.260001), 1.1(0.250016), 4.1(3f), 3.1(3i), 3.6.1, 6.0(1b), 4.6.2-FC2, 6.0(2.260026), 4.12.6, 4.0(1h), 4.3(2e), 4.0(1g), 6.0(1.250194), 3.1(3a), 4.2(1d), 3.11.1, 3.5.1, 4.3(6d), 4.0(1.260004), 4.9.4-FC3, 4.0(4e), 4.3(6.260017), 4.12.7, 4.3(2.230207), 4.0(4g), 4.0(1c), 4.3(3.240022), 3.12.1, 4.0(2i), 4.1(2m), 4.1(2f), 4.9.4, 4.12.3, 4.2(1l), 4.3(2b), 6.0(1.250192), 4.8.1, 4.3(6c), 4.0(2l), 4.1(3d), 4.3(4f), 4.0(2k), 4.3(2.240053), 4.3(4.252002), 3.11.3, 4.11.1, 4.1(3i), 4.0(2a), 3.1(3k), 4.3(4.240142), 4.3(6.250053), 4.0(2m), 6.0(2.260069), 4.0(4b), 4.3(6a), 3.1(3c), 4.3(4.240152), 4.0(2e), 4.3(4c), 4.2(3k), 3.3.1

Description

A vulnerability in the Unified Extensible Firmware Interface (UEFI) Shell implementation of Cisco UCS Servers and UCS-based appliances could allow an authenticated attacker with valid credentials for a user account with the role of user or admin or an unauthenticated attacker with physical access to an affected device to bypass UEFI Secure Boot validation checks and execute unauthorized software. This vulnerability is due to the availability of memory write commands in the UEFI Shell while UEFI Secure Boot is enabled on a device. An attacker could exploit this vulnerability by selecting the UEFI Shell boot option at boot time and using available shell commands to modify UEFI memory variables. A successful exploit could allow the attacker to manipulate the preboot environment, overwrite UEFI Secure Boot-related memory values, and execute unauthorized software on the affected device.

Gravité et risque d'exploitation

CVE-2026-20293 obtient un score CVSS de 7.1/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.16 %, ce qui la place devant 4.5 % des CVE référencées.

Que faire ?

Vérifiez si Cisco Enterprise NFV Infrastructure Software (versions 4.12.4, 4.1(3c), 3.5.2, 4.2(1c), 3.8.1, 3.4.1, 4.1(1h), 4.12.2, 4.2.2, 4.14.1, 4.2(2e), 6.0(1.251030), 4.15.2, 4.3(5d), 3.1(3d), 6.0(1.250174), 4.15.1, 4.1(3h), 4.3(3.240043), 4.3(4.242066), 4.2(1i), 4.3(2.240037), 1.0(1.250032), 4.3(1.230097), 3.1(2e), 3.1(3b), 4.2(2c), 4.1(3n), 4.3(1.230124), 4.0(1.240), 4.3(2.240090), 6.0(1.250127), 4.3(2.260007), 4.0(2q), 6.0(2.260034), 4.0(4o), 4.15.5, 4.3(3.240041), 4.0(2o), 4.15.6, 3.9.2, 3.1(3h), 3.6.2, 4.2(3h), 3.9.1, 4.3(1.230138), 4.3(4.241014), 4.0(1e), 4.9.3, 4.3(4b), 4.1(1f), 4.3(4.242028), 6.0(1e), 4.0(4j), 1.2(0.260005), 3.1(3j), 4.2(3d), 4.3(6e), 4.13.1, 4.3(2.250016), 4.3(2.250045), 2.0(2.260101), 4.2(1k), 4.8.2, 4.6.3, 3.10.1, 4.0(4k), 4.3(5c), 4.9.2, 4.1(1b), 4.1(3a), 1.0(1.250002), 4.0(2b), 4.4.3, 4.3(5e), 1.1(0.250022), 4.2(3o), 1.1(0.250026), 4.2(3r), 4.1(2l), 1.1(0.250025), 3.12.2, 4.0(4m), 4.3(6b), 4.0(1d), 6.0(1c), 1.0(0.250003), 4.0(2p), 4.3(5.250001), 4.3(2.250022), 4.0(2h), 4.9.1, 3.1(3g), 4.3(3a), 4.0(1a), 4.4.2, 4.12.8, 4.1(2b), 4.0(2g), 3.12.1b, 4.1(3j), 4.1(1d), 4.3(4a), 4.2(3j), 4.2(3l), 6.0(1.251006), 4.1(2e), 4.1(2k), 4.2(3i), 4.0(4h), 4.1(1e), 4.1(3l), 4.9.10, 4.1(4a), 4.0(2n), 4.2(3p), 4.0(2r), 4.2.1, 4.2(3e), 4.3(6.250040), 4.3(5.250033), 4.3(4d), 4.1(1a), 4.3(6.250044), 4.12.5, 4.1.2, 4.0(4d), 4.2(1f), 4.2(3b), 4.1(3m), 6.0(1f), 3.1(1d), 6.0(2c), 4.0(4i), 4.1(1g), 4.3(2.250037), 4.3(6.260003), 3.6.3, 4.9.5, 4.0(2f), 4.3(5a), 4.0(1.260003), 4.2(1j), 4.3(2c), 4.15.3, 4.9.6, 4.0(2d), 4.3(4.252001), 4.2(3n), 6.0(1.250131), 4.3(6.250117), 4.3(5.250045), 3.7.1, 4.1(3e), 4.1(2h), 4.2(1g), 4.3(6.260033), 6.0(1d), 4.6.3-FC4, 4.3(2f), 6.0(1.250130), 4.0(4c), 2.0(1.250096), 4.12.1, 6.0(2.260044), 4.4.1, 4.3(4e), 3.1(2i), 3.10.2, 2.0(1.250127), 4.0(4n), 4.3(5.250030), 4.3(2.240107), 6.0(1h), 4.6.4, 4.1(2g), 4.1(2j), 4.6.2, 4.3(6f), 4.0(4l), 3.1(2b), 4.2(2d), 4.2(1n), 4.3(4.242038), 4.1(2c), 3.12.1a, 4.2(1m), 4.2(2f), 1.2(0.250011), 4.0(4f), 4.1(3b), 4.1(2d), 4.1(3g), 4.0(1b), 4.1(1c), 3.12.3, 4.2(1e), 4.2(3q), 4.3(5.250043), 4.5.1, 4.3(6g), 4.3(2.230270), 4.0(4a), 3.1(2c), 4.2(1b), 4.2(2g), 4.2(1a), 3.10.3, 4.15.4, 4.3(2.240077), 4.3(5.240021), 4.3(6.250060), 4.10.1, 2.0(2.260062), 4.1.1, 3.11.2, 4.2(3g), 4.1(2a), 4.1(3k), 4.6.1, 6.0(2.260042), 3.1(2g), 4.3(4.241063), 6.0(2b), 4.3(2.250021), 4.3(2.250063), 1.0(0.240001), 4.2(2a), 4.3(2.240002), 4.3(2.240009), 3.1(2d), 4.3(3c), 1.2(0.250013), 4.3(6.250101), 4.7.1, 4.2(3m), 4.3(6.250039), 4.0(2c), 6.0(1.260001), 1.1(0.250016), 4.1(3f), 3.1(3i), 3.6.1, 6.0(1b), 4.6.2-FC2, 6.0(2.260026), 4.12.6, 4.0(1h), 4.3(2e), 4.0(1g), 6.0(1.250194), 3.1(3a), 4.2(1d), 3.11.1, 3.5.1, 4.3(6d), 4.0(1.260004), 4.9.4-FC3, 4.0(4e), 4.3(6.260017), 4.12.7, 4.3(2.230207), 4.0(4g), 4.0(1c), 4.3(3.240022), 3.12.1, 4.0(2i), 4.1(2m), 4.1(2f), 4.9.4, 4.12.3, 4.2(1l), 4.3(2b), 6.0(1.250192), 4.8.1, 4.3(6c), 4.0(2l), 4.1(3d), 4.3(4f), 4.0(2k), 4.3(2.240053), 4.3(4.252002), 3.11.3, 4.11.1, 4.1(3i), 4.0(2a), 3.1(3k), 4.3(4.240142), 4.3(6.250053), 4.0(2m), 6.0(2.260069), 4.0(4b), 4.3(6a), 3.1(3c), 4.3(4.240152), 4.0(2e), 4.3(4c), 4.2(3k), 3.3.1) 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-ucs-uefi-sb-bypass-eb6xC5GW