CVE-2026-33387Network attack vector

Application data modification via dashboard template injection

Published Sep 8, 2026 · Updated Sep 8, 2026

Template injection in Nozomi Networks Guardian and CMC before 26.3.0 allows remote authenticated users to alter application data. The Dashboards functionality accepts an insufficiently validated input parameter and executes an embedded payload in a viewer's browser context. Exploitation requires dashboard-authoring privileges or a victim who imports and views a malicious dashboard, and it permits data modification or service disruption.

CVSS severity5.1
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Template injection in Nozomi Networks Guardian and CMC before 26.3.0 allows remote authenticated users to alter application data. The Dashboards functionality accepts an insufficiently validated input parameter and executes an embedded payload in a viewer's browser context. Exploitation requires dashboard-authoring privileges or a victim who imports and views a malicious dashboard, and it permits data modification or service disruption.

The record

CVE
CVE-2026-33387
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Nozomi Networks
Product
Guardian
Classifications
CWE-1336, CAPEC-242, T1059.007, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <26.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nozomi Networks · Guardianversion=0 <26.3.0
Nozomi Networks · Central Management Console (CMC)version=0 <26.3.0

Published CVSS scores

5.1Nozomi NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
4.6Nozomi NetworksCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CAPEC-242Code Injection
T1059.007JavaScript/JScript
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo