CVE-2023-20016

Credential disclosure via static backup encryption key

Published Feb 23, 2023 · Updated Oct 25, 2024

Static-key cryptographic failure in Cisco UCS Manager before 4.2(3d) allows attackers with a backup file to decrypt stored credentials. The backup function encrypts full-state and configuration backups with a static key, allowing that key to recover local-user, authentication-server, and SNMP secrets. Exploitation requires prior access to an exported backup file; it does not provide network access to the appliance or permit configuration changes.

CVSS severity6.3
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Static-key cryptographic failure in Cisco UCS Manager before 4.2(3d) allows attackers with a backup file to decrypt stored credentials. The backup function encrypts full-state and configuration backups with a static key, allowing that key to recover local-user, authentication-server, and SNMP secrets. Exploitation requires prior access to an exported backup file; it does not provide network access to the appliance or permit configuration changes.

The record

CVE
CVE-2023-20016
Published
Feb 23, 2023
Updated
Oct 25, 2024
Vendor
ClamAV
Product
Cisco Unified Computing System (Managed)
Classifications
CWE-321, T1552.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Computing System (Managed)version=n/a

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
6.3Cisco Systems, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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