CVE-2026-33389: Disabled and non-configurable certificate/host key validation in Smart Polling in Guardian/CMC before 26.3.0 and Arc before v2.7.0
Nozomi Networks · Guardian
Vendor fix available · Affected: Nozomi Networks Guardian · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 6% of scored CVEs
DescriptionCVE.org
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.
Affected products3
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Nozomi Networks · Guardianbefore 26.3.0
- Nozomi Networks · CMCbefore 26.3.0
- Nozomi Networks · Arcbefore 2.7.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Nozomi Networks
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-33389 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.