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CVE-2025-40899

Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0

Published: Apr 15, 2026Updated: May 12, 2026 Sources: CVE List NVD csafCWE-79
NVD MITRE
8.9CVSSHIGH
EPSS Score
0.3%
Top 79.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter. An authenticated user with custom fields privileges can define a malicious custom field containing a JavaScript payload. When the victim views the Assets or Nodes pages, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:LI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-79

Affected Products

GuardianNozomi Networks
On-premSecurity Product
Security Products / vuln-mgmt-scanner
CMCNozomi Networks
On-premSecurity Product
Security Products / vuln-mgmt-scanner
nozomi networkscommercialSecurity Productsaka nozomi networks

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://security.nozominetworks.com/NN-2026:2-01
security.nozominetworks.com
https://cert-portal.siemens.com/productcert/html/ssa-827968.html
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/csaf/ssa-827968.json
cert-portal.siemens.com
and 23 more references View all →

Timeline

Published
Apr 15, 2026
Last Updated
May 12, 2026

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