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Cisco UCS Central Software Remote Code Execution Vulnerability

3 sources · 4 articlesFirst reported Updated ()
What's new

First merged summary.

Merged summary · x-ai/grok-4.7 · rewritten as coverage arrivesSummaries by Vani AI

Authenticated remote code execution vulnerability in Cisco UCS Central Software prior to 2.1(2c).

A vulnerability in Cisco UCS Central Software allows an authenticated remote attacker to achieve remote code execution or information disclosure. It stems from insufficient validation of user-supplied input in HTTP requests. An attacker must have valid credentials to exploit it. Successful exploitation could enable arbitrary command execution, file writes, and sensitive data access. The Canadian Centre for Cyber Security issued advisory AV26-1127 urging users to apply updates to affected versions.

Key facts
  • Affects Cisco UCS Central Software prior to 2.1(2c)
  • Requires valid user credentials
  • Insufficient input validation in HTTP requests
  • Enables arbitrary command execution and file writes
  • Allows information disclosure
  • Advisory AV26-1127
Analyze CVE-2026-20043 with Vani AIImpact, affected versions, exploitation, mitigations and detection

Timeline

dated events in the reporting · oldest first
  1. Nov 4, 2026Cisco Security Advisories report UCS Central RCE vulnerability · Cisco Security Advisories
  2. Nov 4, 2026Canadian Centre for Cyber Security issues AV26-1127 on UCS Central Software · Canadian Centre for Cyber Security

What each outlet adds

beyond the shared facts
  • Cisco Security AdvisoriesDetails on insufficient input validation allowing authenticated RCE and info disclosure
  • Canadian Centre for Cyber SecurityAdvisory AV26-1127 for versions prior to 2.1(2c)

Coverage

oldest first · one row per article · UTC
  1. · 6d ago ZDI Published AdvisoriesFirst report

    Cisco Snort header unfolding flaw enables remote code execution

    Unauthenticated remote code execution vulnerability in Cisco Snort with CVSS 9.8.

  2. · 5d ago Cisco Security Advisories

    Cisco UCS Central Software Faces Remote Code Execution Vulnerability

    Insufficient input validation in UCS Central Software HTTP requests allows authenticated remote code execution and information disclosure.

  3. · 5d ago Cisco Security Advisories

    Cisco Unified Communications Manager Faces Cross-Site Scripting Vulnerability

    Unvalidated input in the web interface of Cisco Unified Communications Manager and SME could allow unauthenticated remote XSS attacks via crafted links.

  4. · 4d ago Canadian Centre for Cyber Security

    Cisco UCS Central Software prior to 2.1(2c) affected by remote code execution

    Cisco UCS Central Software Remote Code Execution Vulnerability in versions prior to 2.1(2c).

Vulnerabilities in this story

All
CVEVulnerabilityCVSSEPSSSignalsPublished
CVE-2026-20043
Out-of-bounds write in Cisco open-source Snort 3
9.0—