Cisco Nexus Dashboard up to 4.2.1 missing authentication

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.6	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Cisco Nexus Dashboard. This issue affects some unknown processing. Performing a manipulation results in missing authentication. This vulnerability was named CVE-2026-20326. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Nexus Dashboard. It has been classified as very critical. This affects an unknown functionality. The manipulation with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20326 since 10/08/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/19/2026).

The vulnerability scanner Nessus provides a plugin with the ID 348238 (Cisco Nexus Dashboard Software Security Hardening Release: September 2026 (cisco-sa-hardening-ndw1-psFvnrg)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (348238). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Forum Software

Vendor

• Cisco

Name

• Nexus Dashboard

Version

• 2.1(1d)
• 2.1(1e)
• 2.1(2d)
• 2.1(2f)
• 2.2(1e)
• 2.2(1h)
• 2.2(2d)
• 2.3(1c)
• 2.3(2b)
• 2.3(2c)
• 2.3(2d)
• 2.3(2e)
• 3.0(1f)
• 3.0(1i)
• 3.1(1k)
• 3.1(1l)
• 3.1(1n)
• 3.2(1e)
• 3.2(1i)
• 3.2(2f)
• 3.2(2g)
• 3.2(2m)
• 3.3(1a)
• 3.3(1b)
• 3.3(2b)
• 3.3(2g)
• 4.0(1i)
• 4.1(1g)
• 4.2.1

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.6

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (cisco): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 348238
Nessus Name: Cisco Nexus Dashboard Software Security Hardening Release: September 2026 (cisco-sa-hardening-ndw1-psFvnrg)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/08/2025 CVE reserved
09/16/2026 +343 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/19/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: cisco.com

Advisory: sec.cloudapps.cisco.com
Status: Confirmed

CVE: CVE-2026-20326 (🔒)
GCVE (CVE): GCVE-0-2026-20326
GCVE (VulDB): GCVE-100-406113

Entryinfo

Created: 09/16/2026 22:24
Updated: 09/19/2026 04:12
Changes: 09/16/2026 22:24 (64), 09/19/2026 04:12 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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