CVE-2026-9509: CWE-248 Uncaught exception in Suprema BioStar 2 (server)
An unhandled exception in Suprema BioStar 2 (Server), versions 2.9.8, 2.9.10, and 2.9.11, that allows an unauthenticated remote attacker to cause a denial of service (DoS) by sending HTTP POST requests to the ‘/api/migration’ endpoint. This request triggers a failure that halts critical processes, leaving the system offline until the services or server are manually restarted. As a result, access control readers cease to function, and potential failures may occur in third-party integrations. Since the exploit requires no privileges or user interaction and is trivial to automate, the impact on availability is high, and the effect extends to interconnected systems.
AI Analysis
Technical Summary
An unhandled exception vulnerability (CWE-248) exists in Suprema BioStar 2 server versions 2.9.8, 2.9.10, and 2.9.11. An unauthenticated remote attacker can send crafted HTTP POST requests to the '/api/migration' endpoint, causing the server to fail and halt critical processes. This denial of service leaves the system offline until manual intervention restarts the services or server. The vulnerability affects availability and can disrupt connected access control hardware and integrations. The CVSS 4.0 base score is 8.7, reflecting high severity with network attack vector, no required privileges, and no user interaction.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause a denial of service by crashing the Suprema BioStar 2 server. This halts critical processes, rendering access control readers non-functional and potentially disrupting third-party integrations dependent on the server. The system remains offline until manually restarted, causing significant availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, organizations should consider restricting network access to the '/api/migration' endpoint to trusted sources only and monitor for unusual POST requests targeting this endpoint. Manual restart of services or the server is required to recover from an attack.
CVE-2026-9509: CWE-248 Uncaught exception in Suprema BioStar 2 (server)
Description
An unhandled exception in Suprema BioStar 2 (Server), versions 2.9.8, 2.9.10, and 2.9.11, that allows an unauthenticated remote attacker to cause a denial of service (DoS) by sending HTTP POST requests to the ‘/api/migration’ endpoint. This request triggers a failure that halts critical processes, leaving the system offline until the services or server are manually restarted. As a result, access control readers cease to function, and potential failures may occur in third-party integrations. Since the exploit requires no privileges or user interaction and is trivial to automate, the impact on availability is high, and the effect extends to interconnected systems.
CVSS v4.0
Score 8.7high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An unhandled exception vulnerability (CWE-248) exists in Suprema BioStar 2 server versions 2.9.8, 2.9.10, and 2.9.11. An unauthenticated remote attacker can send crafted HTTP POST requests to the '/api/migration' endpoint, causing the server to fail and halt critical processes. This denial of service leaves the system offline until manual intervention restarts the services or server. The vulnerability affects availability and can disrupt connected access control hardware and integrations. The CVSS 4.0 base score is 8.7, reflecting high severity with network attack vector, no required privileges, and no user interaction.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause a denial of service by crashing the Suprema BioStar 2 server. This halts critical processes, rendering access control readers non-functional and potentially disrupting third-party integrations dependent on the server. The system remains offline until manually restarted, causing significant availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, organizations should consider restricting network access to the '/api/migration' endpoint to trusted sources only and monitor for unusual POST requests targeting this endpoint. Manual restart of services or the server is required to recover from an attack.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- INCIBE
- Date Reserved
- 2026-05-25T13:58:49.181Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a198b23e29bf47b50e58dfb
Added to database: 5/29/2026, 12:48:35 PM
Last enriched: 5/29/2026, 1:03:25 PM
Last updated: 5/29/2026, 6:33:47 PM
Views: 9
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