PatchSiren cyber security CVE debrief
CVE-2026-90456 CISA CVE debrief
A bundled inventory-management component's example environment-configuration file contains a fixed, publicly-known administrative password. Deployments copying this example into active configuration without regenerating credentials expose the component's administrative interface. This issue allows potential unauthorized access and disruption of inventory-management component functionality. Defenders should verify configurations, regenerate credentials, and restrict access to prevent unauthorized access and potential disruptions.
- Vendor
- CISA
- Product
- Malcolm
- CVSS
- CRITICAL 9.2
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-09-11
- Original CVE updated
- 2026-09-18
- Advisory published
- 2026-09-11
- Advisory updated
- 2026-09-18
Who should care
Defenders responsible for inventory-management component configurations and deployments should assess exposure and prioritize regenerating credentials and restricting administrative interface access.
Why it matters
CVE-2026-90456 exposes the administrative interface of a bundled inventory-management component due to a publicly-known default password in an example configuration file. Defenders should verify configurations, regenerate credentials, and restrict access to prevent unauthorized access and potential disruptions.
- Potential unauthorized access to the administrative interface
- Possible disruption of inventory-management component functionality
- Need for verification of component configurations and credential regeneration
- Potential impact on supply chain and inventory management processes
Technical summary
The example environment-configuration file for a bundled inventory-management component ships with a fixed, publicly-known administrative password. Deployments that copy this example file into active configuration without running the setup routine that regenerates credentials will expose that component's administrative interface. This vulnerability highlights the importance of secure configuration practices and the need for defenders to verify configurations and restrict access to prevent unauthorized access and potential disruptions.
Defensive priority
Immediately verify inventory-management component configurations for exposure, prioritize regenerating credentials, and restrict administrative interface access.
Recommended defensive actions
- Verify inventory-management component configurations for exposure
- Regenerate credentials for the administrative interface
- Restrict access to the administrative interface
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
Evidence notes
The CVE record and NVD entry provide limited information about affected versions and remediation. Further verification is required to determine the scope of affected systems and to confirm the effectiveness of proposed mitigations. The lack of detailed information necessitates a cautious approach, with defenders needing to assess their specific configurations for exposure and take steps to secure the administrative interface.
Sources and references
Verified primary and authoritative sources
-
CVE-2026-90456 CVE Program record
Publisher, destination, and source semantics verified
URL: https://www.cve.org/CVERecord?id=CVE-2026-90456
CVE Program - Official CVE Program record with source-provided CVE metadata.
-
CVE-2026-90456 NVD vulnerability detail
Publisher, destination, and source semantics verified
URL: https://nvd.nist.gov/vuln/detail/CVE-2026-90456
NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.
Supplemental references
-
Source reference
Unverified legacy reference
URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.json
Methodology and review provenance
AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.