Medium severity · published Sep 8, 2026
CVE-2026-33387
Insufficient sanitization of Dashboards in Guardian/CMC before 26.3.0
4.6
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
CMC · Nozomi Networks
before 26.3.0 · source: vendor
GU
Guardian · Nozomi Networks
before 26.3.0 · source: vendor
RA
In the news
VulnerabilityHigh
Siemens RUGGEDCOM APE1808 Devices
View CSAF Summary Nozomi Networks has published information on vulnerabilities in Nozomi Guardian/CMC. This advisory lists the related Siemens Industrial products affected by these vulnerabilities. Siemens recommends to contact customer support to receive patch and update information. The following versions of Siemens RUGGEDCOM APE1808 Devices are affected: RUGGEDCOM APE1808 vers:all/* (CVE-2026-33387, CVE-2026-33388, CVE-2026-33389, CVE-2026-33391, CVE-2026-33920) CVSS Vendor Equipment v3 7.5 Siemens RUGGEDCOM APE1808 4 Vulnerabilities Improper Neutralization of Special Elements Used in a Template Engine, Incorrect Authorization, Lack of Administrator Control over Security, Cross-Site Request Forgery (CSRF) Background Critical Infrastructure Sectors: Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-33387 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 pay...
Oct 22, 2026·CISA Advisories
Affected product
CM
CMC
Nozomi Networks
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