High severity · published Dec 18, 2025
CVE-2025-40898
Path traversal in Import Arc data archive functionality in Guardian/CMC before 25.5.0
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
A path traversal vulnerability was discovered in the Import Arc data archive functionality due to insufficient validation of the input file. An authenticated user with limited privileges, by uploading a specifically-crafted Arc data archive, can potentially write arbitrary files in arbitrary paths, altering the device configuration and/or affecting its 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)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
CMC · Nozomi Networks
before 25.5.0 · source: vendor, NVD
GU
Guardian · Nozomi Networks
before 25.5.0 · source: vendor, NVD
RA
RUGGEDCOM APE1808 · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40898
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40898
Mitigation
https://security.nozominetworks.com/NN-2025:15-01
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-827968.html
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