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Nozomi Guardian CVE-2026-33387

| EUVDEUVD-2026-72761 MEDIUM
Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336)
2026-09-08 Nozomi GHSA-xp2q-mg9h-jmmm
5.1
CVSS 4.0 · Vendor: Nozomi
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Severity by source

Vendor (Nozomi) PRIMARY
5.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
4.6 MEDIUM

Authenticated low-privilege account required (PR:L), victim must view or import the dashboard (UI:R); no confidentiality impact confirmed.

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

Primary rating from Vendor (Nozomi).

CVSS VectorVendor: Nozomi

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
P
Scope
X

Lifecycle Timeline

2
Analysis Generated
Sep 08, 2026 - 14:21 vuln.today
Patch available
Sep 08, 2026 - 14:02 EUVD

DescriptionCVE.org

A template injection vulnerability was discovered in the Dashboards functionality due to improper validation of an input parameter. An authenticated user with the required privileges can define a dashboard containing a malicious payload, or a victim can be socially engineered into importing a malicious dashboard. When the victim views or imports the dashboard, the payload executes in their browser context, allowing the attacker to modify application data or disrupt application availability.

AnalysisAI

Server-side template injection (SSTI) in Nozomi Networks Guardian and CMC Dashboard functionality (versions prior to 26.3.0) allows an authenticated low-privilege user to embed malicious template payloads in dashboard definitions. When a victim - potentially one with elevated privileges - views or imports the crafted dashboard, the payload executes in their browser context, enabling modification of application data or disruption of the monitoring platform. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated account on the Nozomi Networks Guardian or CMC platform with at least low-level dashboard creation or management privileges (CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 5.1 (Medium) accurately reflects the constrained impact: exploitation requires an authenticated low-privilege account (PR:L) and passive victim interaction (UI:P), and there is no confidentiality impact (VC:N) - only limited integrity (VI:L) and availability (VA:L) consequences. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade Nozomi Networks Guardian and CMC to version 26.3.0 or later, per vendor advisory NN-2026:16-01 (https://security.nozominetworks.com/NN-2026:16-01). … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-33387 vulnerability details – vuln.today

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