Analyst readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated remote attacker knock Suprema BioStar 2 Server offline. The business impact is availability: access control readers may stop functioning, and connected third-party integrations may fail until services or the server are manually restarted.
Executive priority
Treat this as a high-priority availability risk for physical access operations. It can disrupt reader function and integrations without authentication, so exposed affected servers should be remediated or isolated quickly.
Technical view
CVE-2026-9509 is a CWE-248 unhandled exception in Suprema BioStar 2 Server versions 2.9.8, 2.9.10, and 2.9.11. Unauthenticated HTTP POST traffic to the /api/migration endpoint can halt critical processes, causing denial of service. CVSS 4.0 score is 8.7 with high availability impact.
Likely exposure
Exposure is limited to organizations running affected BioStar 2 Server versions, especially where the server or API is reachable from untrusted networks. The provided affected list marks other versions as unaffected by default, but operators should confirm against vendor guidance.
Exploitation context
The source bundle says exploitation requires no privileges or user interaction and is trivial to automate. It does not show evidence of active exploitation, and KEV status is false in the provided data.
Researcher notes
Evidence is sufficient for affected versions, impact, CVSS, CWE, and vulnerable endpoint. The bundle does not provide a fixed version, detailed patch instructions, or confirmed exploitation. Avoid assuming broader Suprema product impact without vendor confirmation.
Mitigation direction
- Check Suprema or INCIBE guidance for the fixed version or official workaround.
- Prioritize remediation for internet-exposed or untrusted-network BioStar 2 servers.
- Restrict access to BioStar 2 server management and API surfaces.
- Prepare operational restart procedures for affected services during remediation.
Validation and detection
- Inventory BioStar 2 Server versions across access-control environments.
- Confirm whether any affected server exposes the API to untrusted networks.
- Review monitoring for unexpected BioStar 2 service stoppages or restarts.
- Test remediation in a staging environment before production rollout.
Public sources used
Based on public source material and reviewed before publication.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-248: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-9509 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N — — INCIBE Vulnerability scoring details
Base CVSS 4.0 score
8.7 HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 source CVE List V5
- https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-supremas-biostar CVE reference, INCIBE · patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncaught Exception
Uncaught Exception represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.