Vulnerability Database

418,242

Total vulnerabilities in the database

CVE-2026-20293 — cisco / enterprise_nfv_infrastructure_software

Exposed Dangerous Method or Function

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.

  • Published: Sep 8, 2026
  • Updated: Nov 14, 2026
  • CVE: CVE-2026-20293
  • Severity: High
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: High
  • Score: 7.1
  • AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CWEs:

Software Affected versions
cisco / enterprise_nfv_infrastructure_software = 3.3.1
cisco / enterprise_nfv_infrastructure_software = 3.4.1
cisco / enterprise_nfv_infrastructure_software = 3.5.1
cisco / enterprise_nfv_infrastructure_software = 3.5.2
cisco / enterprise_nfv_infrastructure_software = 3.6.1
cisco / enterprise_nfv_infrastructure_software = 3.6.2
cisco / enterprise_nfv_infrastructure_software = 3.6.3
cisco / enterprise_nfv_infrastructure_software = 3.7.1
cisco / enterprise_nfv_infrastructure_software = 3.8.1
cisco / enterprise_nfv_infrastructure_software = 3.9.1
cisco / enterprise_nfv_infrastructure_software = 3.9.2
cisco / enterprise_nfv_infrastructure_software = 3.10.1
cisco / enterprise_nfv_infrastructure_software = 3.10.2
cisco / enterprise_nfv_infrastructure_software = 3.10.3
cisco / enterprise_nfv_infrastructure_software = 3.11.1
cisco / enterprise_nfv_infrastructure_software = 3.11.2
cisco / enterprise_nfv_infrastructure_software = 3.11.3
cisco / enterprise_nfv_infrastructure_software = 3.12.1
cisco / enterprise_nfv_infrastructure_software = 3.12.1a
cisco / enterprise_nfv_infrastructure_software = 3.12.1b
cisco / enterprise_nfv_infrastructure_software = 3.12.2
cisco / enterprise_nfv_infrastructure_software = 3.12.3
cisco / enterprise_nfv_infrastructure_software = 4.1.1
cisco / enterprise_nfv_infrastructure_software = 4.1.2
cisco / enterprise_nfv_infrastructure_software = 4.2.1
cisco / enterprise_nfv_infrastructure_software = 4.2.2
cisco / enterprise_nfv_infrastructure_software = 4.4.1
cisco / enterprise_nfv_infrastructure_software = 4.4.2
cisco / enterprise_nfv_infrastructure_software = 4.4.3
cisco / enterprise_nfv_infrastructure_software = 4.5.1
cisco / enterprise_nfv_infrastructure_software = 4.6.1
cisco / enterprise_nfv_infrastructure_software = 4.6.2
cisco / enterprise_nfv_infrastructure_software = 4.6.2-fc2
cisco / enterprise_nfv_infrastructure_software = 4.6.3
cisco / enterprise_nfv_infrastructure_software = 4.6.3-fc4
cisco / enterprise_nfv_infrastructure_software = 4.6.4
cisco / enterprise_nfv_infrastructure_software = 4.7.1
cisco / enterprise_nfv_infrastructure_software = 4.8.1
cisco / enterprise_nfv_infrastructure_software = 4.8.2
cisco / enterprise_nfv_infrastructure_software = 4.9.1
cisco / enterprise_nfv_infrastructure_software = 4.9.2
cisco / enterprise_nfv_infrastructure_software = 4.9.3
cisco / enterprise_nfv_infrastructure_software = 4.9.4
cisco / enterprise_nfv_infrastructure_software = 4.9.4-fc3
cisco / enterprise_nfv_infrastructure_software = 4.9.5
cisco / enterprise_nfv_infrastructure_software = 4.9.6
cisco / enterprise_nfv_infrastructure_software = 4.9.10
cisco / enterprise_nfv_infrastructure_software = 4.10.1
cisco / enterprise_nfv_infrastructure_software = 4.11.1
cisco / enterprise_nfv_infrastructure_software = 4.12.1
cisco / enterprise_nfv_infrastructure_software = 4.12.2
cisco / enterprise_nfv_infrastructure_software = 4.12.3
cisco / enterprise_nfv_infrastructure_software = 4.12.4
cisco / enterprise_nfv_infrastructure_software = 4.12.5
cisco / enterprise_nfv_infrastructure_software = 4.12.6
cisco / enterprise_nfv_infrastructure_software = 4.12.7
cisco / enterprise_nfv_infrastructure_software = 4.12.8
cisco / enterprise_nfv_infrastructure_software = 4.13.1
cisco / enterprise_nfv_infrastructure_software = 4.14.1
cisco / enterprise_nfv_infrastructure_software = 4.15.1
cisco / enterprise_nfv_infrastructure_software = 4.15.2
cisco / enterprise_nfv_infrastructure_software = 4.15.3
cisco / enterprise_nfv_infrastructure_software = 4.15.4
cisco / enterprise_nfv_infrastructure_software = 4.15.5
cisco / enterprise_nfv_infrastructure_software = 4.15.6
cisco / unified_computing_system = 4.0(1a)
cisco / unified_computing_system = 4.0(1b)
cisco / unified_computing_system = 4.0(1c)
cisco / unified_computing_system = 4.0(1d)
cisco / unified_computing_system = 4.0(2a)
cisco / unified_computing_system = 4.0(2b)
cisco / unified_computing_system = 4.0(2d)
cisco / unified_computing_system = 4.0(2e)
cisco / unified_computing_system = 4.0(4a)
cisco / unified_computing_system = 4.0(4b)
cisco / unified_computing_system = 4.0(4c)
cisco / unified_computing_system = 4.0(4d)
cisco / unified_computing_system = 4.0(4e)
cisco / unified_computing_system = 4.0(4f)
cisco / unified_computing_system = 4.0(4g)
cisco / unified_computing_system = 4.0(4h)
cisco / unified_computing_system = 4.0(4i)
cisco / unified_computing_system = 4.0(4k)
cisco / unified_computing_system = 4.0(4l)
cisco / unified_computing_system = 4.0(4m)
cisco / unified_computing_system = 4.0(4n)
cisco / unified_computing_system = 4.0(4o)
cisco / unified_computing_system = 4.1(1a)
cisco / unified_computing_system = 4.1(1b)
cisco / unified_computing_system = 4.1(1c)
cisco / unified_computing_system = 4.1(1d)
cisco / unified_computing_system = 4.1(1e)
cisco / unified_computing_system = 4.1(2a)
cisco / unified_computing_system = 4.1(2b)
cisco / unified_computing_system = 4.1(2c)
cisco / unified_computing_system = 4.1(3a)
cisco / unified_computing_system = 4.1(3b)
cisco / unified_computing_system = 4.1(3c)
cisco / unified_computing_system = 4.1(3d)
cisco / unified_computing_system = 4.1(3e)
cisco / unified_computing_system = 4.1(3f)
cisco / unified_computing_system = 4.1(3h)
cisco / unified_computing_system = 4.1(3i)
cisco / unified_computing_system = 4.1(3j)
cisco / unified_computing_system = 4.1(3k)
cisco / unified_computing_system = 4.1(3l)
cisco / unified_computing_system = 4.1(3m)
cisco / unified_computing_system = 4.1(3n)
cisco / unified_computing_system = 4.1(4a)
cisco / unified_computing_system = 4.2(1c)
cisco / unified_computing_system = 4.2(1d)
cisco / unified_computing_system = 4.2(1f)
cisco / unified_computing_system = 4.2(1i)
cisco / unified_computing_system = 4.2(1k)
cisco / unified_computing_system = 4.2(1l)
cisco / unified_computing_system = 4.2(1m)
cisco / unified_computing_system = 4.2(1n)
cisco / unified_computing_system = 4.2(2a)
cisco / unified_computing_system = 4.2(2c)
cisco / unified_computing_system = 4.2(2d)
cisco / unified_computing_system = 4.2(2e)
cisco / unified_computing_system = 4.2(3b)
cisco / unified_computing_system = 4.2(3d)
cisco / unified_computing_system = 4.2(3e)
cisco / unified_computing_system = 4.2(3g)
cisco / unified_computing_system = 4.2(3h)
cisco / unified_computing_system = 4.2(3i)
cisco / unified_computing_system = 4.2(3j)
cisco / unified_computing_system = 4.2(3k)
cisco / unified_computing_system = 4.2(3l)
cisco / unified_computing_system = 4.2(3m)
cisco / unified_computing_system = 4.2(3n)
cisco / unified_computing_system = 4.2(3o)
cisco / unified_computing_system = 4.2(3p)
cisco / unified_computing_system = 4.2(3r)
cisco / unified_computing_system = 4.3(2b)
cisco / unified_computing_system = 4.3(2c)
cisco / unified_computing_system = 4.3(2e)
cisco / unified_computing_system = 4.3(2f)
cisco / unified_computing_system = 4.3(3a)
cisco / unified_computing_system = 4.3(3c)
cisco / unified_computing_system = 4.3(4a)
cisco / unified_computing_system = 4.3(4b)
cisco / unified_computing_system = 4.3(4c)
cisco / unified_computing_system = 4.3(4d)
cisco / unified_computing_system = 4.3(4e)
cisco / unified_computing_system = 4.3(4f)
cisco / unified_computing_system = 4.3(5a)
cisco / unified_computing_system = 4.3(5c)
cisco / unified_computing_system = 4.3(5d)
cisco / unified_computing_system = 4.3(5e)
cisco / unified_computing_system = 4.3(6a)
cisco / unified_computing_system = 4.3(6b)
cisco / unified_computing_system = 4.3(6c)
cisco / unified_computing_system = 4.3(6d)
cisco / unified_computing_system = 4.3(6e)
cisco / unified_computing_system = 4.3(6f)
cisco / unified_computing_system = 4.3(6g)
cisco / unified_computing_system = 6.0(1b)
cisco / unified_computing_system = 6.0(1c)
cisco / unified_computing_system = 6.0(1d)
cisco / unified_computing_system = 6.0(1e)
cisco / unified_computing_system = 6.0(1f)
cisco / unified_computing_system = 6.0(1h)
cisco / unified_computing_system = 6.0(2b)
cisco / unified_computing_system = 6.0(2c)
cisco / unified_computing_system = 1.0(0.240001)
cisco / unified_computing_system = 1.0(0.250003)
cisco / unified_computing_system = 1.0(1.250002)
cisco / unified_computing_system = 1.0(1.250032)
cisco / unified_computing_system = 1.1(0.250016)
cisco / unified_computing_system = 1.1(0.250022)
cisco / unified_computing_system = 1.1(0.250025)
cisco / unified_computing_system = 1.1(0.250026)
cisco / unified_computing_system = 1.2(0.250011)
cisco / unified_computing_system = 1.2(0.250013)
cisco / unified_computing_system = 1.2(0.260005)
cisco / unified_computing_system = 2.0(1.250096)
cisco / unified_computing_system = 2.0(1.250127)
cisco / unified_computing_system = 2.0(2.260062)
cisco / unified_computing_system = 2.0(2.260101)
cisco / unified_computing_system = 3.1(1d)
cisco / unified_computing_system = 3.1(2b)
cisco / unified_computing_system = 3.1(2c)
cisco / unified_computing_system = 3.1(2d)
cisco / unified_computing_system = 3.1(2e)
cisco / unified_computing_system = 3.1(2g)
cisco / unified_computing_system = 3.1(2i)
cisco / unified_computing_system = 3.1(3a)
cisco / unified_computing_system = 3.1(3b)
cisco / unified_computing_system = 3.1(3c)
cisco / unified_computing_system = 3.1(3d)
cisco / unified_computing_system = 3.1(3g)
cisco / unified_computing_system = 3.1(3h)
cisco / unified_computing_system = 3.1(3i)
cisco / unified_computing_system = 3.1(3j)
cisco / unified_computing_system = 3.1(3k)
cisco / unified_computing_system = 4.0(1.240)
cisco / unified_computing_system = 4.0(1.260003)
cisco / unified_computing_system = 4.0(1.260004)
cisco / unified_computing_system = 4.0(1e)
cisco / unified_computing_system = 4.0(1g)
cisco / unified_computing_system = 4.0(1h)
cisco / unified_computing_system = 4.0(2c)
cisco / unified_computing_system = 4.0(2f)
cisco / unified_computing_system = 4.0(2g)
cisco / unified_computing_system = 4.0(2h)
cisco / unified_computing_system = 4.0(2i)
cisco / unified_computing_system = 4.0(2k)
cisco / unified_computing_system = 4.0(2l)
cisco / unified_computing_system = 4.0(2m)
cisco / unified_computing_system = 4.0(2n)
cisco / unified_computing_system = 4.0(2o)
cisco / unified_computing_system = 4.0(2p)
cisco / unified_computing_system = 4.0(2q)
cisco / unified_computing_system = 4.0(2r)
cisco / unified_computing_system = 4.0(4j)
cisco / unified_computing_system = 4.1(1f)
cisco / unified_computing_system = 4.1(1g)
cisco / unified_computing_system = 4.1(1h)
cisco / unified_computing_system = 4.1(2d)
cisco / unified_computing_system = 4.1(2e)
cisco / unified_computing_system = 4.1(2f)
cisco / unified_computing_system = 4.1(2g)
cisco / unified_computing_system = 4.1(2h)
cisco / unified_computing_system = 4.1(2j)
cisco / unified_computing_system = 4.1(2k)
cisco / unified_computing_system = 4.1(2l)
cisco / unified_computing_system = 4.1(2m)
cisco / unified_computing_system = 4.1(3g)
cisco / unified_computing_system = 4.2(1a)
cisco / unified_computing_system = 4.2(1b)
cisco / unified_computing_system = 4.2(1e)
cisco / unified_computing_system = 4.2(1g)
cisco / unified_computing_system = 4.2(1j)
cisco / unified_computing_system = 4.2(2f)
cisco / unified_computing_system = 4.2(2g)
cisco / unified_computing_system = 4.2(3q)
cisco / unified_computing_system = 4.3(1.230097)
cisco / unified_computing_system = 4.3(1.230124)
cisco / unified_computing_system = 4.3(1.230138)
cisco / unified_computing_system = 4.3(2.230207)
cisco / unified_computing_system = 4.3(2.230270)
cisco / unified_computing_system = 4.3(2.240002)
cisco / unified_computing_system = 4.3(2.240009)
cisco / unified_computing_system = 4.3(2.240037)
cisco / unified_computing_system = 4.3(2.240053)
cisco / unified_computing_system = 4.3(2.240077)
cisco / unified_computing_system = 4.3(2.240090)
cisco / unified_computing_system = 4.3(2.240107)
cisco / unified_computing_system = 4.3(2.250016)
cisco / unified_computing_system = 4.3(2.250021)
cisco / unified_computing_system = 4.3(2.250022)
cisco / unified_computing_system = 4.3(2.250037)
cisco / unified_computing_system = 4.3(2.250045)
cisco / unified_computing_system = 4.3(2.250063)
cisco / unified_computing_system = 4.3(2.260007)
cisco / unified_computing_system = 4.3(3.240022)
cisco / unified_computing_system = 4.3(3.240041)
cisco / unified_computing_system = 4.3(3.240043)
cisco / unified_computing_system = 4.3(4.240142)
cisco / unified_computing_system = 4.3(4.240152)
cisco / unified_computing_system = 4.3(4.241014)
cisco / unified_computing_system = 4.3(4.241063)
cisco / unified_computing_system = 4.3(4.242028)
cisco / unified_computing_system = 4.3(4.242038)
cisco / unified_computing_system = 4.3(4.242066)
cisco / unified_computing_system = 4.3(4.252001)
cisco / unified_computing_system = 4.3(4.252002)
cisco / unified_computing_system = 4.3(5.240021)
cisco / unified_computing_system = 4.3(5.250001)
cisco / unified_computing_system = 4.3(5.250030)
cisco / unified_computing_system = 4.3(5.250033)
cisco / unified_computing_system = 4.3(5.250043)
cisco / unified_computing_system = 4.3(5.250045)
cisco / unified_computing_system = 4.3(6.250039)
cisco / unified_computing_system = 4.3(6.250040)
cisco / unified_computing_system = 4.3(6.250044)
cisco / unified_computing_system = 4.3(6.250053)
cisco / unified_computing_system = 4.3(6.250060)
cisco / unified_computing_system = 4.3(6.250101)
cisco / unified_computing_system = 4.3(6.250117)
cisco / unified_computing_system = 4.3(6.260003)
cisco / unified_computing_system = 4.3(6.260017)
cisco / unified_computing_system = 4.3(6.260033)
cisco / unified_computing_system = 6.0(1.250127)
cisco / unified_computing_system = 6.0(1.250130)
cisco / unified_computing_system = 6.0(1.250131)
cisco / unified_computing_system = 6.0(1.250174)
cisco / unified_computing_system = 6.0(1.250192)
cisco / unified_computing_system = 6.0(1.250194)
cisco / unified_computing_system = 6.0(1.251006)
cisco / unified_computing_system = 6.0(1.251030)
cisco / unified_computing_system = 6.0(1.260001)
cisco / unified_computing_system = 6.0(2.260026)
cisco / unified_computing_system = 6.0(2.260034)
cisco / unified_computing_system = 6.0(2.260042)
cisco / unified_computing_system = 6.0(2.260044)
cisco / unified_computing_system = 6.0(2.260069)
cisco / unified_computing_system_e-series_software = 4.11.1
cisco / unified_computing_system_e-series_software = 4.12.1
cisco / unified_computing_system_e-series_software = 4.12.2
cisco / unified_computing_system_e-series_software = 4.15.2
cisco / unified_computing_system_e-series_software = 4.15.3
cisco / unified_computing_system_e-series_software = 4.15.4

Is CVE-2026-20293 exposed on your perimeter?

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Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.