High severity · published Oct 7, 2025
CVE-2025-40889
Path traversal in Time Machine functionality in Guardian/CMC before 25.2.0
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
A path traversal vulnerability was discovered in the Time Machine functionality due to missing validation of two input parameters. An authenticated user with limited privileges, by issuing a specifically-crafted request, can potentially alter the structure and content of files in the /data folder, and/or affect 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)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
CMC · Nozomi Networks
before 25.2.0 · source: vendor, NVD
GU
Guardian · Nozomi Networks
before 25.2.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40889
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40889
Vendor Advisory
https://security.nozominetworks.com/NN-2025:9-01
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