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CVE-2026-20326

Cisco Nexus Dashboard Software Security Hardening Release September 2026 - Missing Authentication for Critical Function

Published: Sep 16, 2026Updated: Sep 18, 2026 Sources: CVE List NVDCWE-306
9.8CRITICAL
NVD MITRE
EPSS Score
0.4%
Top 67.4%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
No Fix Available
Self-Check
Not available

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Nexus Dashboard engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20326 are related to missing authentication for critical function issues that are grouped under the Common Weakness Enumeration (CWE) CWE-306.

In plain language

AI Act now

Cisco Nexus Dashboard has a serious access-control flaw that can let an outsider take over affected systems; small businesses using it should treat this as urgent.

Executive summary

Unauthenticated network-accessible critical-function vulnerability in Cisco Nexus Dashboard caused by missing authentication (CWE-306), with public exploit availability and no documented fixed release.

If affected, business impact
Network management takeoverConfiguration changesService disruptionSensitive network data exposureRansomware risk

What to do now

  1. Check whether your organization runs Cisco Nexus Dashboard and whether its management interface can be reached from the internet or untrusted networks.
  2. Ask Cisco or your support provider for the fixed Cisco Nexus Dashboard release for CVE-2026-20326; no fixed version has been published in the available findings.
  3. Until a fix is available, restrict access to the dashboard to trusted administrator networks and remove public internet exposure.
  4. Review administrator activity and configuration changes for anything unexpected.
May need vendor / contractor work

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-306

Affected Products

Cisco
commercial·USaka cisco systems inc., cisco systems
Cisco Nexus Dashboard
Networking Infrastructure

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
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References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-ndw1-psFvnrg
sec.cloudapps.cisco.com
News mentions
1

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