CVE-2021-1354

Authenticated rogue manager registration via certificate validation

Published Feb 4, 2021 · Updated Nov 8, 2024

Improper certificate validation in Cisco UCS Central Software before 2.0(1m) allows remote authenticated users to register a rogue UCSM via an adjacent HTTP request. The registration API accepts a crafted request without properly validating the UCSM certificate, allowing the rogue manager to access UCS Central data and UCSM inventory. Exploitation requires authenticated access from an adjacent network position; the documented impact is data and inventory disclosure, with no reported configuration alteration or service interruption.

CVSS severity4.3
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Cisco UCS Central Software before 2.0(1m) allows remote authenticated users to register a rogue UCSM via an adjacent HTTP request. The registration API accepts a crafted request without properly validating the UCSM certificate, allowing the rogue manager to access UCS Central data and UCSM inventory. Exploitation requires authenticated access from an adjacent network position; the documented impact is data and inventory disclosure, with no reported configuration alteration or service interruption.

The record

CVE
CVE-2021-1354
Published
Feb 4, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco UCS Central Software
Classifications
CWE-295, T1190
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 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 vectoradjacent
Required privilegesauthenticated

What is affected?

ClamAV · Cisco UCS Central Softwareversion=n/a

Published CVSS scores

4.3CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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