High severity · published Apr 15, 2026
CVE-2025-40897
Incorrect authorization for Threat Intelligence in Guardian/CMC before 26.0.0
8.1
CVSS
0.3%
EPSS
No
On KEV
Description
An access control vulnerability was discovered in the Threat Intelligence functionality due to a specific access restriction not being properly enforced for users with view-only privileges. An authenticated user with view-only privileges for the Threat Intelligence functionality can perform administrative actions on it, altering the rules configuration, and/or affecting their availability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
CMC · Nozomi Networks
before 26.0.0 · source: vendor
GU
Guardian · Nozomi Networks
before 26.0.0 · source: vendor
RA
RUGGEDCOM APE1808 · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40897
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40897
security.nozominetworks.com
https://security.nozominetworks.com/NN-2026:1-01
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-827968.html
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