High severity · published Jul 9, 2026
CVE-2026-33390
Incorrect privilege assignment for Arc sensors in Guardian/CMC before 26.2.0
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
An Incorrect Privilege Assignment vulnerability was discovered in the synchronization functionality due to Arc sensors receiving CLI permissions. An authenticated user with limited privileges can push administrative CLI commands through the sync, 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 26.2.0 · source: vendor, NVD
GU
Guardian · Nozomi Networks
before 26.2.0 · source: vendor, NVD
RA
RUGGEDCOM APE1808 · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33390
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33390
Mitigation
https://security.nozominetworks.com/NN-2026:13-01
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-827968.html
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