CVE-2023-20016

Cisco FXOS Software and UCS Manager Software Configuration Backup Static Key Vulnerability

MEDIUM
6.5
CVSS Score
Published: February 23, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:29 AM UTC
40 products affected across 1 vendorFxosUcs Central SoftwareUcs 6536 Firmware

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

A vulnerability in the backup configuration feature of Cisco UCS Manager Software and in the configuration export feature of Cisco FXOS Software could allow an unauthenticated attacker with access to a backup file to decrypt sensitive information stored in the full state and configuration backup files. This vulnerability is due to a weakness in the encryption method used for the backup function. An attacker could exploit this vulnerability by leveraging a static key used for the backup configuration feature. A successful exploit could allow the attacker to decrypt sensitive information that is stored in full state and configuration backup files, such as local user credentials, authentication server passwords, Simple Network Management Protocol (SNMP) community names, and other credentials.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.6.1
Affected range stops below 2.6.1, so it looks safe — our inference, not a vendor statement
cisco-firepower-4100 (environment) · cisco-firepower-4110 (environment) · cisco-firepower-4112 (environment) · cisco-firepower-4115 (environment) · cisco-firepower-4120 (environment) · cisco-firepower-4125 (environment) · cisco-firepower-4140 (environment) · cisco-firepower-4145 (environment) · cisco-firepower-4150 (environment) · cisco-firepower-9300-sm-24 (environment) · cisco-firepower-9300-sm-36 (environment) · cisco-firepower-9300-sm-40 (environment) · cisco-firepower-9300-sm-44 (environment) · cisco-firepower-9300-sm-44-x-3 (environment) · cisco-firepower-9300-sm-48 (environment) · cisco-firepower-9300-sm-56 (environment) · cisco-firepower-9300-sm-56-x-3 (environment)
All versions
cisco-ucs-6200 (same device)
All versions
cisco-ucs-6248up (same device)
All versions
cisco-ucs-6296up (same device)
All versions
cisco-ucs-6300 (same device)
All versions
cisco-ucs-6324 (same device)
All versions
cisco-ucs-6332-16up (same device)
All versions
cisco-ucs-6332 (same device)
All versions
cisco-ucs-64108 (same device)
All versions
cisco-ucs-6454 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-321CWE-330

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