Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Unmeasured Boot Vulnerability

published 2019-05-03 7y ago modified 2026-06-17 4mo ago also EUVD-2019-10146

cvss: 4.2; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits: 0; none known

A vulnerability in the Trusted Platform Module (TPM) functionality of software for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, local attacker with physical access to view sensitive information on an affected device. The vulnerability is due to a lack of proper data-protection mechanisms for disk encryption keys that are used within the partitions on an affected device hard drive. An attacker could exploit this vulnerability by obtaining physical access to the affected device to view certain cleartext keys. A successful exploit could allow the attacker to execute a custom boot process or conduct further attacks on an affected device.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: last yr. (2024-11-21)

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	4.2	CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	4.6	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

Cisco Cisco NX-OS Software for Nexus 9000 Series Fabric Switches ACI Mode

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-311 Missing Encryption of Sensitive Data

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-aci-unmeasured-boot
vendor-advisory
securityfocus.com /bid/108175
vdb-entry, third-party-advisory

Sources

CVE List CVE-2019-1589
NVD CVE-2019-1589

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