NN-2026:19-01
Incorrect authorization in Credentials Manager in Guardian/CMC before 26.3.0
| Advisory ID | NN-2026:19-01 |
|---|---|
| Topic | Incorrect authorization in Credentials Manager in Guardian/CMC before 26.3.0 |
| CWE Impact | CWE-863: Incorrect Authorization |
| Issue date | 2026-09-08 |
| Affects | Guardian, CMC < v26.3.0 |
| CVE Name(s) | CVE-2026-33388 |
| CVSS Details | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:H/SI:L/SA:L CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L |
| CVSS Score | 6.4 (CVSS v4.0) 7.4 (CVSS v3.1) |
| CVE Risk Level | Medium (CVSS v4.0) High (CVSS v3.1) |
| Risk Level for Nozomi customers | High |
Summary
An access control vulnerability was discovered in the Credentials Manager functionality due to insufficient validation of user privileges.
Impact
A remote authenticated user with limited privileges can view a limited subset of the available entries in the Credentials Manager. The actual credential values are not directly visible, but the user can delete entries or edit their properties. An attacker who deletes or edits an entry can disrupt authentication for dependent devices, and one who manipulates an entry's configuration may be able to indirectly obtain the credentials.
Affected Products
Guardian, CMC < v26.3.0
Workarounds and Mitigations
Use internal firewall features to limit access to the web management interface. Review all accounts with access to it and delete unnecessary ones. Review the existing entries in the Credentials Manager for unauthorized modifications.
Solutions
Upgrade to v26.3.0 or later.
Modification History
Related Links
Acknowledgements
We thank the following parties for their efforts:
- Elia Battiston of Nozomi Networks for finding this issue during an internal investigation
Contact
Nozomi Networks Product Security team can be reached at prodsec@nozominetworks.com.More contact details on the PSIRT page.