TI-2026-25786 Aliases CVE-2026-33389 GHSA-8g88-35qx-36v7

Disabled and non-configurable certificate/host key validation in Smart Polling in…

LOW 23CWE-671Published 2026-09-08 · Updated 2026-10-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00167 6th percentileScored 2026-11-07

Fix Fixed Guardian (Nozomi Networks): 26.3.0CMC (Nozomi Networks): 26.3.0+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Nozomi Networks	Guardian	before 26.3.0	26.3.0	Patch available	CNA
Nozomi Networks	CMC	before 26.3.0	26.3.0	Patch available	CNA
Nozomi Networks	Arc	before 2.7.0	2.7.0	Patch available	CNA

Guardian VendorNozomi Networks Affected before 26.3.0 Fixed in 26.3.0 Patch available CNA
CMC VendorNozomi Networks Affected before 26.3.0 Fixed in 26.3.0 Patch available CNA
Arc VendorNozomi Networks Affected before 2.7.0 Fixed in 2.7.0 Patch available CNA

Remediation

Fix · CNA Guardian (Nozomi Networks) Fixed in 26.3.0
Fix · CNA CMC (Nozomi Networks) Fixed in 26.3.0
Fix · CNA Arc (Nozomi Networks) Fixed in 2.7.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-09-08
Nozomi Networks CMC, Guardian 26.3.0
5 records Highest priority Priority LOW 5 LOW
Other records, highest priority first
- TI-2026-25785 Incorrect authorization in Credentials Manager in Guardian/CMC before 26.3.0Priority LOW 29
- TI-2026-25788 Incorrect authorization in Smart Polling configuration in Guardian/CMC before 26.3.0Priority LOW 24
- TI-2026-25784 Insufficient sanitization of Dashboards in Guardian/CMC before 26.3.0Priority LOW 23
Show all 5 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-33389
2026-10-03 Alias added: GHSA-8g88-35qx-36v7

References

Other 1

https://security.nozominetworks.com/NN-2026:20-01

TI-2022-00470 Authenticated RCE on project configuration import in Guardian/CMC before 22.0.0 CVSS 4.0HIGH 8.6
TI-2026-24526 DoS through oversized audit log entries in Guardian/CMC before 26.2.0 CVSS 4.0HIGH 8.7
TI-2023-15926 DoS on IDS parsing of malformed asset fields in Guardian/CMC >= 22.6.0 before 22.6.3 and 23.1.0 CVSS 4.0HIGH 8.2
TI-2023-13657 SQL Injection on IDS parsing of malformed asset fields in Guardian/CMC >= 22.6.0 before 22.6.3 and 23.1.0 CVSS 4.0CRITICAL 9.2
TI-2024-00196 DoS on IDS parsing of malformed Radius packets in Guardian before 23.4.1 CVSS 4.0HIGH 8.2
TI-2021-08402 Authenticated command injection when changing date settings or hostname in Guardian/CMC before 20.0.7.4 CVSS 4.0HIGH 8.6

See all 64 →

Sources

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