7.1

CVE-2026-20293

Medienbericht

Cisco UCS and UCS-Based Appliances UEFI Shell Secure Boot Bypass Vulnerability

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerCisco
≫
Produkt Cisco Enterprise NFV Infrastructure Software
Default Statusunknown
Version 4.1.1
Status affected
Version 3.9.1
Status affected
Version 3.5.2
Status affected
Version 3.12.2
Status affected
Version 3.6.2
Status affected
Version 3.9.2
Status affected
Version 3.11.3
Status affected
Version 3.11.1
Status affected
Version 3.5.1
Status affected
Version 3.3.1
Status affected
Version 3.10.2
Status affected
Version 3.12.1b
Status affected
Version 3.4.1
Status affected
Version 3.12.1a
Status affected
Version 3.6.3
Status affected
Version 3.8.1
Status affected
Version 3.11.2
Status affected
Version 3.12.1
Status affected
Version 3.12.3
Status affected
Version 3.10.1
Status affected
Version 3.6.1
Status affected
Version 3.10.3
Status affected
Version 3.7.1
Status affected
Version 4.1.2
Status affected
Version 4.2.1
Status affected
Version 4.2.2
Status affected
Version 4.4.1
Status affected
Version 4.4.2
Status affected
Version 4.5.1
Status affected
Version 4.4.3
Status affected
Version 4.6.1
Status affected
Version 4.7.1
Status affected
Version 4.6.2-FC2
Status affected
Version 4.6.2
Status affected
Version 4.8.1
Status affected
Version 4.8.2
Status affected
Version 4.9.1
Status affected
Version 4.6.3
Status affected
Version 4.9.2
Status affected
Version 4.10.1
Status affected
Version 4.9.3
Status affected
Version 4.11.1
Status affected
Version 4.9.4
Status affected
Version 4.12.1
Status affected
Version 4.6.4
Status affected
Version 4.12.2
Status affected
Version 4.13.1
Status affected
Version 4.9.5
Status affected
Version 4.12.3
Status affected
Version 4.14.1
Status affected
Version 4.6.3-FC4
Status affected
Version 4.9.4-FC3
Status affected
Version 4.12.4
Status affected
Version 4.15.1
Status affected
Version 4.9.6
Status affected
Version 4.15.2
Status affected
Version 4.12.5
Status affected
Version 4.15.3
Status affected
Version 4.15.4
Status affected
Version 4.12.6
Status affected
Version 4.15.5
Status affected
Version 4.12.7
Status affected
Version 4.12.8
Status affected
Version 4.15.6
Status affected
Version 4.9.10
Status affected
HerstellerCisco
≫
Produkt Cisco Unified Computing System (Managed)
Default Statusunknown
Version 4.0(1a)
Status affected
Version 4.1(1a)
Status affected
Version 4.1(1b)
Status affected
Version 4.0(4h)
Status affected
Version 4.1(1c)
Status affected
Version 4.0(4e)
Status affected
Version 4.0(4g)
Status affected
Version 4.0(2e)
Status affected
Version 4.0(4a)
Status affected
Version 4.0(2d)
Status affected
Version 4.0(1b)
Status affected
Version 4.0(4f)
Status affected
Version 4.0(4c)
Status affected
Version 4.0(1c)
Status affected
Version 4.0(4b)
Status affected
Version 4.0(2b)
Status affected
Version 4.0(4d)
Status affected
Version 4.0(2a)
Status affected
Version 4.0(1d)
Status affected
Version 4.0(4i)
Status affected
Version 4.1(1d)
Status affected
Version 4.1(2a)
Status affected
Version 4.1(1e)
Status affected
Version 4.1(2b)
Status affected
Version 4.0(4k)
Status affected
Version 4.1(3a)
Status affected
Version 4.1(3b)
Status affected
Version 4.1(2c)
Status affected
Version 4.0(4l)
Status affected
Version 4.1(4a)
Status affected
Version 4.1(3c)
Status affected
Version 4.1(3d)
Status affected
Version 4.2(1c)
Status affected
Version 4.2(1d)
Status affected
Version 4.0(4m)
Status affected
Version 4.1(3e)
Status affected
Version 4.2(1f)
Status affected
Version 4.1(3f)
Status affected
Version 4.2(1i)
Status affected
Version 4.2(1k)
Status affected
Version 4.0(4n)
Status affected
Version 4.1(3h)
Status affected
Version 4.2(1l)
Status affected
Version 4.2(1m)
Status affected
Version 4.1(3i)
Status affected
Version 4.2(2a)
Status affected
Version 4.2(1n)
Status affected
Version 4.1(3j)
Status affected
Version 4.2(2c)
Status affected
Version 4.2(2d)
Status affected
Version 4.2(3b)
Status affected
Version 4.1(3k)
Status affected
Version 4.0(4o)
Status affected
Version 4.2(2e)
Status affected
Version 4.2(3d)
Status affected
Version 4.2(3e)
Status affected
Version 4.2(3g)
Status affected
Version 4.1(3l)
Status affected
Version 4.3(2b)
Status affected
Version 4.2(3h)
Status affected
Version 4.2(3i)
Status affected
Version 4.3(2c)
Status affected
Version 4.1(3m)
Status affected
Version 4.3(2e)
Status affected
Version 4.3(3a)
Status affected
Version 4.2(3j)
Status affected
Version 4.3(3c)
Status affected
Version 4.3(4a)
Status affected
Version 4.2(3k)
Status affected
Version 4.3(4b)
Status affected
Version 4.3(4c)
Status affected
Version 4.2(3l)
Status affected
Version 4.3(4d)
Status affected
Version 4.2(3m)
Status affected
Version 4.3(2f)
Status affected
Version 4.3(5a)
Status affected
Version 4.3(4e)
Status affected
Version 4.1(3n)
Status affected
Version 4.3(4f)
Status affected
Version 4.2(3n)
Status affected
Version 4.3(5c)
Status affected
Version 4.2(3o)
Status affected
Version 4.3(5d)
Status affected
Version 4.3(6a)
Status affected
Version 4.3(6b)
Status affected
Version 4.3(5e)
Status affected
Version 4.3(6c)
Status affected
Version 6.0(1b)
Status affected
Version 4.2(3p)
Status affected
Version 6.0(1c)
Status affected
Version 4.3(6d)
Status affected
Version 6.0(1d)
Status affected
Version 6.0(1e)
Status affected
Version 4.3(6e)
Status affected
Version 6.0(1f)
Status affected
Version 4.3(6f)
Status affected
Version 6.0(2b)
Status affected
Version 6.0(1h)
Status affected
Version 4.2(3r)
Status affected
Version 6.0(2c)
Status affected
Version 4.3(6g)
Status affected
HerstellerCisco
≫
Produkt Cisco Unified Computing System (Standalone)
Default Statusunknown
Version 4.0(2g)
Status affected
Version 3.1(2i)
Status affected
Version 3.1(1d)
Status affected
Version 4.0(4i)
Status affected
Version 4.1(1c)
Status affected
Version 4.0(2c)
Status affected
Version 4.0(1e)
Status affected
Version 4.0(2h)
Status affected
Version 4.0(4h)
Status affected
Version 4.0(1h)
Status affected
Version 4.0(2l)
Status affected
Version 3.1(3g)
Status affected
Version 4.0(1.240)
Status affected
Version 4.0(2f)
Status affected
Version 4.0(1g)
Status affected
Version 4.0(2i)
Status affected
Version 3.1(3i)
Status affected
Version 4.0(4d)
Status affected
Version 4.1(1d)
Status affected
Version 3.1(3c)
Status affected
Version 4.0(4k)
Status affected
Version 3.1(2d)
Status affected
Version 3.1(3a)
Status affected
Version 3.1(3j)
Status affected
Version 4.0(2d)
Status affected
Version 4.1(1f)
Status affected
Version 4.0(4j)
Status affected
Version 4.0(2m)
Status affected
Version 4.0(2k)
Status affected
Version 4.0(1c)
Status affected
Version 4.0(4f)
Status affected
Version 4.0(4c)
Status affected
Version 3.1(3d)
Status affected
Version 3.1(2g)
Status affected
Version 3.1(2c)
Status affected
Version 4.0(1d)
Status affected
Version 3.1(2e)
Status affected
Version 4.0(1a)
Status affected
Version 4.0(1b)
Status affected
Version 3.1(3b)
Status affected
Version 4.0(4b)
Status affected
Version 3.1(2b)
Status affected
Version 4.0(4e)
Status affected
Version 3.1(3h)
Status affected
Version 4.0(4l)
Status affected
Version 4.1(1g)
Status affected
Version 4.1(2a)
Status affected
Version 4.0(2n)
Status affected
Version 4.1(1h)
Status affected
Version 3.1(3k)
Status affected
Version 4.1(2b)
Status affected
Version 4.0(2o)
Status affected
Version 4.0(4m)
Status affected
Version 4.1(2d)
Status affected
Version 4.1(3b)
Status affected
Version 4.0(2p)
Status affected
Version 4.1(2e)
Status affected
Version 4.1(2f)
Status affected
Version 4.0(4n)
Status affected
Version 4.0(2q)
Status affected
Version 4.1(3c)
Status affected
Version 4.0(2r)
Status affected
Version 4.1(3d)
Status affected
Version 4.1(2g)
Status affected
Version 4.1(2h)
Status affected
Version 4.1(3g)
Status affected
Version 4.1(3f)
Status affected
Version 4.1(2j)
Status affected
Version 4.1(2k)
Status affected
Version 4.1(3h)
Status affected
Version 4.2(2a)
Status affected
Version 4.1(3i)
Status affected
Version 4.2(2f)
Status affected
Version 4.2(2g)
Status affected
Version 4.2(3b)
Status affected
Version 4.1(3l)
Status affected
Version 4.2(3d)
Status affected
Version 4.3(1.230097)
Status affected
Version 4.2(1e)
Status affected
Version 4.2(1b)
Status affected
Version 4.2(1j)
Status affected
Version 4.2(1i)
Status affected
Version 4.2(1f)
Status affected
Version 4.2(1a)
Status affected
Version 4.2(1c)
Status affected
Version 4.2(1g)
Status affected
Version 4.3(1.230124)
Status affected
Version 4.1(2l)
Status affected
Version 4.2(3e)
Status affected
Version 4.3(1.230138)
Status affected
Version 4.2(3g)
Status affected
Version 4.3(2.230207)
Status affected
Version 4.2(3h)
Status affected
Version 4.2(3i)
Status affected
Version 4.3(2.230270)
Status affected
Version 4.1(3m)
Status affected
Version 4.1(2m)
Status affected
Version 4.3(2.240002)
Status affected
Version 4.3(3.240022)
Status affected
Version 4.2(3j)
Status affected
Version 4.1(3n)
Status affected
Version 4.3(2.240009)
Status affected
Version 4.3(3.240041)
Status affected
Version 4.2(3k)
Status affected
Version 4.3(3.240043)
Status affected
Version 4.3(4.240142)
Status affected
Version 4.3(2.240037)
Status affected
Version 4.3(2.240053)
Status affected
Version 4.3(4.240152)
Status affected
Version 4.2(3l)
Status affected
Version 4.3(2.240077)
Status affected
Version 4.3(4.242028)
Status affected
Version 4.3(4.241063)
Status affected
Version 4.3(4.242038)
Status affected
Version 4.2(3m)
Status affected
Version 4.3(2.240090)
Status affected
Version 4.3(5.240021)
Status affected
Version 4.3(2.240107)
Status affected
Version 4.3(4.242066)
Status affected
Version 4.2(3n)
Status affected
Version 4.3(5.250001)
Status affected
Version 4.2(3o)
Status affected
Version 4.3(2.250016)
Status affected
Version 4.3(2.250021)
Status affected
Version 4.3(5.250030)
Status affected
Version 4.3(2.250022)
Status affected
Version 4.3(6.250039)
Status affected
Version 4.3(6.250040)
Status affected
Version 4.3(5.250033)
Status affected
Version 4.3(6.250044)
Status affected
Version 4.3(6.250053)
Status affected
Version 4.3(2.250037)
Status affected
Version 4.3(2.250045)
Status affected
Version 4.3(4.252001)
Status affected
Version 4.3(4.252002)
Status affected
Version 6.0(1.250127)
Status affected
Version 4.2(3p)
Status affected
Version 6.0(1.250131)
Status affected
Version 4.3(6.250101)
Status affected
Version 6.0(1.250174)
Status affected
Version 4.3(6.250117)
Status affected
Version 4.3(5.250043)
Status affected
Version 4.3(5.250045)
Status affected
Version 4.3(6.250060)
Status affected
Version 6.0(1.250130)
Status affected
Version 4.3(4.241014)
Status affected
Version 6.0(1.251030)
Status affected
Version 4.3(2.250063)
Status affected
Version 6.0(1.250192)
Status affected
Version 4.3(6.260003)
Status affected
Version 6.0(1.250194)
Status affected
Version 6.0(1.260001)
Status affected
Version 4.3(6.260017)
Status affected
Version 4.3(2.260007)
Status affected
Version 6.0(2.260044)
Status affected
Version 6.0(2.260042)
Status affected
Version 4.0(1.260003)
Status affected
Version 2.0(2.260062)
Status affected
Version 2.0(1.250127)
Status affected
Version 2.0(1.250096)
Status affected
Version 4.0(1.260004)
Status affected
Version 6.0(2.260026)
Status affected
Version 6.0(1.251006)
Status affected
Version 1.2(0.250011)
Status affected
Version 1.1(0.250016)
Status affected
Version 1.0(0.240001)
Status affected
Version 1.0(0.250003)
Status affected
Version 1.2(0.250013)
Status affected
Version 1.1(0.250026)
Status affected
Version 1.0(1.250002)
Status affected
Version 1.1(0.250022)
Status affected
Version 1.1(0.250025)
Status affected
Version 1.0(1.250032)
Status affected
Version 6.0(2.260034)
Status affected
Version 6.0(2.260069)
Status affected
Version 4.3(6.260033)
Status affected
Version 2.0(2.260101)
Status affected
Version 4.2(3q)
Status affected
Version 4.2(3r)
Status affected
Version 1.2(0.260005)
Status affected
HerstellerCisco
≫
Produkt Cisco Unified Computing System E-Series Software (UCSE)
Default Statusunknown
Version 4.11.1
Status affected
Version 4.12.1
Status affected
Version 4.12.2
Status affected
Version 4.15.2
Status affected
Version 4.15.3
Status affected
Version 4.15.4
Status affected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.13% 0.031
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Cisco PSIRT 7.1 1.8 5.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-749 Exposed Dangerous Method or Function

The product provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted.

Für Zugriff zu Vulnerability Intelligence ist ein VulnDex Zugang erforderlich.
VulnDex Intel
Media Report
23.09.2026 17:01
Für Zugriff zu Vulnerability Intelligence ist ein VulnDex Zugang erforderlich.
VulnDex Intel
Media Report
14.09.2026 17:54
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW