CVE-2026-31981

A Stored HTML Injection vulnerability was discovered in the Diagram tab and Graph view due to a shared input validation function being insufficiently restrictive. An authenticated user with administrative privileges can inject malicious HTML tags into N2OS configuration data through multiple input vectors. When a victim views the affected data in the Diagram tab and Graph view, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.7 / Impact : 3.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://security.nozominetworks.com/NN-2026:8-01	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nozominetworks:cmc::::::::
	cpe:2.3:a:nozominetworks:guardian::::::::

History

10 Jul 2026, 13:15

Type	Values Removed	Values Added
First Time		Nozominetworks Nozominetworks cmc Nozominetworks guardian
CPE		cpe:2.3:a:nozominetworks:cmc:::::::: cpe:2.3:a:nozominetworks:guardian::::::::
References	~~() https://security.nozominetworks.com/NN-2026:8-01 -~~	() https://security.nozominetworks.com/NN-2026:8-01 - Mitigation, Vendor Advisory

09 Jul 2026, 08:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-09 08:16

Updated : 2026-07-10 13:15

NVD link : CVE-2026-31981

Mitre link : CVE-2026-31981

CVE.ORG link : CVE-2026-31981

JSON object : View

Products Affected

nozominetworks

cmc
guardian

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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