High severity · published Sep 8, 2026
CVE-2026-33388
Incorrect authorization in Credentials Manager in Guardian/CMC before 26.3.0
7.4
CVSS
0.4%
EPSS
No
On KEV
Description
An access control vulnerability was discovered in the Credentials Manager functionality due to insufficient validation of user privileges. A remote authenticated user with limited privileges can view a limited subset of the available entries in the Credentials Manager. The actual credential values are not directly visible, but the user can delete entries or edit their properties. An attacker who deletes or edits an entry can disrupt authentication for dependent devices, and one who manipulates an entry's configuration may be able to indirectly obtain the credentials.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% 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
RUGGEDCOM APE1808 · Siemens
0 · source: CISA
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
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33388
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33388
security.nozominetworks.com
https://security.nozominetworks.com/NN-2026:19-01
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-911336.html
More from CMC
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