Nozomi Networks Guardian Lack Of Administrator Control Over Security Exposed to Unauthenticated Network Attackers
Last refreshed2026-10-15
Status: UPDATED
| Advisory ID: CVE-2026-33389
Key Details
CVE
CVE-2026-33389
CVSS Score / Version
7.5 (High) / CVSS v3.1
Updated
2026-10-15
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L
CVSS Prose
attack vector is network; attack complexity is high; privileges required is none; user interaction is required; scope is changed; confidentiality impact is high; integrity impact is low; availability impact is low.
CWE-671 (Lack of Administrator Control over Security)
Exploitation prediction (EPSS)
0.17% probability of exploitation in the next 30 days (6% percentile) -- FIRST.org's EPSS model.
Affected Products, Subsystems & Sectors
Vendor
Product
Affected Versions
Patch Status
Nozomi Networks
Guardian
Nozomi Networks
CMC
Siemens
RUGGEDCOM APE1808
Nozomi Networks
Arc
Subsystems
Industrial Networking & Connectivity
Sectors
Multiple
What to Know
An improper certificate/host key validation vulnerability was discovered in the Smart Polling functionality, which established encrypted connections to target devices without validating the remote host's identity, and no option was provided to enable it. A man-in-the-middle attacker positioned between a sensor and a polled device can, during a polling session, impersonate the device and intercept the communication, including the credentials used to access it. The captured credentials can then be replayed to authenticate against the device itself or against other devices sharing the same credentials, allowing the attacker to access and tamper with the device's data and to disrupt its operations. (NVD)
What to Do
Monitor Nozomi Networks's and Siemens's web pages for any future patch releases.