Anviz CX7 Firmware: Missing Authentication for Critical Functionality
CVE-2026-40461 is a high-severity missing authentication for critical functionality vulnerability in Anviz CX7 Firmware from Anviz, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Anviz CX7 Firmware versions: All versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Anviz CX7 Firmware you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Anviz | Anviz CX7 Firmware | All versions | Not stated |
| Anviz | Anviz CX2 Lite Firmware | All versions | Not stated |
| Anviz | Cx7 Firmware | Not specified in the record | Not stated |
| Anviz | Cx2 Lite Firmware | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. Scored by CNA (hq.dhs.gov).
Official description
Anviz CX2 Lite and CX7 are vulnerable to unauthenticated POST requests that modify debug settings (e.g., enabling SSH), allowing unauthorized state changes that can facilitate later compromise.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How developers prevent this class of flaw
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data.
More Missing Authentication for Critical Functionality vulnerabilities (CWE-306)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.jsonThird Party Advisory
- cisa.gov/news-events/ics-advisories/icsa-26-106-03US Government Resource
Other references
- anviz.com/contact-us.htmlProduct
Other vulnerabilities in Anviz CX7 Firmware
- 8.8 High severity
- 9.8 Critical severity
- 7.7 High severity
Recent Missing Authentication for Critical Functionality vulnerabilities
- 8.8 High severity
- 8.6 High severity
- 7.2 High severity
- 8.8 High severity
- 9.1 Critical severity
- 9.3 Critical severity
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